Articles related to "Wavelength"
Astronomy of a Different Color: New Wavelengths Open New Windows
wavelengths • radio astronomy • ultraviolet astronomy • infrared astronomy • opttical wavelengths
wavelengths • radio astronomy • ultraviolet astronomy • infrared astronomy • opttical wavelengths
Spectroscopy and Types of Spectra
Spectroscopy allows astronomers to deduce the chemical compositions of distant astronomical objects. What is astronomical spectroscopy and how does it work?
spectroscopy • astronomical • spectroscope • emission • absorption
Spectroscopy allows astronomers to deduce the chemical compositions of distant astronomical objects. What is astronomical spectroscopy and how does it work?
spectroscopy • astronomical • spectroscope • emission • absorption
The Electromagnetic Spectrum
What is the electromagnetic spectrum? It consists of all types of electromagnetic waves, including radio waves, X & gamma rays, & visible, ultraviolet, & infrared light.
what is the electromagnetic spectrum • electromagnetic waves • electromagnetic radiation • infrared light • visible light
What is the electromagnetic spectrum? It consists of all types of electromagnetic waves, including radio waves, X & gamma rays, & visible, ultraviolet, & infrared light.
what is the electromagnetic spectrum • electromagnetic waves • electromagnetic radiation • infrared light • visible light
A Little Wave Action
There's more to a wave than meets the shore. Find out what makes them travel and how they are measured.
wave • transverse_wave • longitudinal_wave • energy • amplitude
There's more to a wave than meets the shore. Find out what makes them travel and how they are measured.
wave • transverse_wave • longitudinal_wave • energy • amplitude
Doppler Effect for Moving Objects
The Doppler effect works for both light and sound. In light the wavelength of a spectral line changes. For sound the pitch changes.
doppler effect • blue shift • red shift • light • sound
The Doppler effect works for both light and sound. In light the wavelength of a spectral line changes. For sound the pitch changes.
doppler effect • blue shift • red shift • light • sound
Point and Shoot Digital Infrared Photography
With a digital camera, an infrared filter, and a tripod, creating unique and expressive infrared photos has never been easier.
infrared • digital • photography • filter • wavelength
With a digital camera, an infrared filter, and a tripod, creating unique and expressive infrared photos has never been easier.
infrared • digital • photography • filter • wavelength
SPECIAL REFLECTIONS
Special Reflections explains briefly how gemstones get their colors, then describes cat's eyes and asterism, which are two special light effects.
cat's eye • asterism • chatoyancy • star stones • reflected light
Special Reflections explains briefly how gemstones get their colors, then describes cat's eyes and asterism, which are two special light effects.
cat's eye • asterism • chatoyancy • star stones • reflected light
Radio Astronomy
Instead of optical telescopes, astronomers use antennas and computers to study the Universe at wavelengths invisible to the human eye. So, how does that work?
electromagnetic spectrum • national radio astronomy observatory • radio waves • visible light • radio telescopes
Instead of optical telescopes, astronomers use antennas and computers to study the Universe at wavelengths invisible to the human eye. So, how does that work?
electromagnetic spectrum • national radio astronomy observatory • radio waves • visible light • radio telescopes
Color, Part II: Color in Astronomy
Description of some of the vital measurements color provides for astronomers
astronomy • color • color redshift • color-magnitude diagram
Description of some of the vital measurements color provides for astronomers
astronomy • color • color redshift • color-magnitude diagram
Why Are Sunsets and Sunrises Red?
Small particles in the atmosphere scattering light cause both sunsets and sunrises to be red.
red sunset • red sunrise • rayleigh scattering • scattering light • why are sunsets red
Small particles in the atmosphere scattering light cause both sunsets and sunrises to be red.
red sunset • red sunrise • rayleigh scattering • scattering light • why are sunsets red
Why Is the Sky Blue?
Small particles in the atmosphere scattering light cause the blue sky.
blue sky • rayleigh scattering • scattering light • why is the sky blue • carolina blue
Small particles in the atmosphere scattering light cause the blue sky.
blue sky • rayleigh scattering • scattering light • why is the sky blue • carolina blue
Color, Part I: Human Perception
Discussion of human perception of color, reproduction in photographs and by computer monitors
color • human eye • photography • computers
Discussion of human perception of color, reproduction in photographs and by computer monitors
color • human eye • photography • computers
Aquarium Fluorescence
Coral fluorescence is a phenomenon with practical utility to the marine aquarist. It can be easily observed in the aquarium with the right equipment and knowledge.
fluorescence • bioluminescence • phosphorescence • coral fluorescence • marine aquarium
Coral fluorescence is a phenomenon with practical utility to the marine aquarist. It can be easily observed in the aquarium with the right equipment and knowledge.
fluorescence • bioluminescence • phosphorescence • coral fluorescence • marine aquarium
The Cosmic Distance Ladder, III: Measuring the Hubble Constant
a brief discussion on the Hubble constant and recent efforts to measure it
astronomy • c • extragalactic distance scale
a brief discussion on the Hubble constant and recent efforts to measure it
astronomy • c • extragalactic distance scale
Dispersion & Refraction in Optics
When white light passes through a prism it spreads out into all the colors of the rainbow. Physics tells us this results from refraction and dispersion.
dispersion • refraction • optics • snells law • lenses
When white light passes through a prism it spreads out into all the colors of the rainbow. Physics tells us this results from refraction and dispersion.
dispersion • refraction • optics • snells law • lenses
Representing Sound as Pressure Waves
Sounds are pressure waves reaching our hearing apparatus by the movement of surrounding air molecules. Studying waves helps us to understand basic transport mechanisms.
transverse wave • longitudinal wave • sound waves • pressure waves • waves through different media
Sounds are pressure waves reaching our hearing apparatus by the movement of surrounding air molecules. Studying waves helps us to understand basic transport mechanisms.
transverse wave • longitudinal wave • sound waves • pressure waves • waves through different media
Waves
Waves are ubiquitous in the study of physics, and we are intuitively familiar with them from a very early age, but what are they really?
waves • propagation of energy • transverse waves • longitudinal waves • wave interference
Waves are ubiquitous in the study of physics, and we are intuitively familiar with them from a very early age, but what are they really?
waves • propagation of energy • transverse waves • longitudinal waves • wave interference
Why Is Ultraviolet Light Harmful?
Ultraviolet light, a frequency of sunlight, damages skin immediately and over time.
ultraviolet light • uva • uvb • uvc • skin protection
Ultraviolet light, a frequency of sunlight, damages skin immediately and over time.
ultraviolet light • uva • uvb • uvc • skin protection
Sunscreen Smarts
Good sun protection is more than just applying sunscreen during trips to the beach.
skin cancer protection • sunscreen basics • uv and skin damage • sunscreen and uv protection • blocking uv rays
Good sun protection is more than just applying sunscreen during trips to the beach.
skin cancer protection • sunscreen basics • uv and skin damage • sunscreen and uv protection • blocking uv rays
Spectroscopy and Atomic Structure
Bohr's atomic model explains how electrons jumping between orbits in atoms cause emission and absorption line spectra and why each element has its own spectral signature.
spectroscopy • atomic structure • absorption lines • spectral lines • emission lines
Bohr's atomic model explains how electrons jumping between orbits in atoms cause emission and absorption line spectra and why each element has its own spectral signature.
spectroscopy • atomic structure • absorption lines • spectral lines • emission lines
Water on Extrasolar Planets
In early April 2007 astronomers announced the discovery of water on a planet orbiting the star, HD 209458. How is it possible to detect water on an extrasolar planet?
spectroscopy • extrasolar planet • astronomical • infrared • hd 209458b
In early April 2007 astronomers announced the discovery of water on a planet orbiting the star, HD 209458. How is it possible to detect water on an extrasolar planet?
spectroscopy • extrasolar planet • astronomical • infrared • hd 209458b
Sky Surveys (Hubble Isn't the Only Show in Town)
I highlight a couple of sky surveys that also offer nice images.
sdss • 2mass • m17 • sagittarius
I highlight a couple of sky surveys that also offer nice images.
sdss • 2mass • m17 • sagittarius
What is Radio Astronomy?
In addition to visible light, astronomers study radio waves from the Sun, planets, stars, galaxies, and other celestial objects.
radio astronomy • electromagnetic waves • telescopes • reflector telescope • karl jansky
In addition to visible light, astronomers study radio waves from the Sun, planets, stars, galaxies, and other celestial objects.
radio astronomy • electromagnetic waves • telescopes • reflector telescope • karl jansky
Rainbows
Rainbows have been part of human mythology and culture for millennia and have fascinated scientists through the ages as well. From two simple ingredients water drops and light, we can form the beauty of a rainbow. Here's how.
weather • meteorology • rainbows
Rainbows have been part of human mythology and culture for millennia and have fascinated scientists through the ages as well. From two simple ingredients water drops and light, we can form the beauty of a rainbow. Here's how.
weather • meteorology • rainbows
Laser Hair Removal: Is There Any Technology For Us?
This article talks about the laser hair removal that is developed for American Americans
lasers • hair removal • african americans
This article talks about the laser hair removal that is developed for American Americans
lasers • hair removal • african americans
Breakthroughs in Musical Geometry
Researchers in American Universities have been developing precise mathematical formulations used to describe what is currently known about music, and to further human kno
music and math • geometry and music • quantifying mathematics • dmitri tymoczko • ian quinn
Researchers in American Universities have been developing precise mathematical formulations used to describe what is currently known about music, and to further human kno
music and math • geometry and music • quantifying mathematics • dmitri tymoczko • ian quinn
Satellite Detects Chaiten Eruption
The ash being emitted by the May 2008 eruption of Chaiten Volcano is detected using earth observing satellites
volcanic ash • earth observing satellites • chaiten volcano • nasa satellite • aviation hazard
The ash being emitted by the May 2008 eruption of Chaiten Volcano is detected using earth observing satellites
volcanic ash • earth observing satellites • chaiten volcano • nasa satellite • aviation hazard
Solar Antennae that Generate Power
A team at the Idaho National Laboratories has developed an innovative method to manufacture nanoscale antennae at the right size to capture energy from the sun.
solar antenna • solar power innovation • generating electricity from sunlight • nanoscale manufacturing • solar antenna design
A team at the Idaho National Laboratories has developed an innovative method to manufacture nanoscale antennae at the right size to capture energy from the sun.
solar antenna • solar power innovation • generating electricity from sunlight • nanoscale manufacturing • solar antenna design
Detecting Planets Orbiting Stars
Astronomers use high resolution spectroscopy and the Doppler effect to discover extrasolar planets, which are planets outside our solar system.
extrasolar planets • discovering • high resolution • spectroscopy • doppler effect
Astronomers use high resolution spectroscopy and the Doppler effect to discover extrasolar planets, which are planets outside our solar system.
extrasolar planets • discovering • high resolution • spectroscopy • doppler effect
Microwave Ovens Heat Food Unevenly
Why is microwave heating of food often uneven so that one bite is scalding while the next is still frozen?
microwave ovens • microwave ovens heat food unevenly • microwaves • electromagnetic waves • microwave heating
Why is microwave heating of food often uneven so that one bite is scalding while the next is still frozen?
microwave ovens • microwave ovens heat food unevenly • microwaves • electromagnetic waves • microwave heating
Reflection vs. Refraction
Even though reflection and refraction of light are important concepts in optics, they are often confused. The two concepts are unraveled here.
light • reflection • refraction • reflection vs. refraction • refractive index
Even though reflection and refraction of light are important concepts in optics, they are often confused. The two concepts are unraveled here.
light • reflection • refraction • reflection vs. refraction • refractive index
Why no Metal in Microwave Ovens?
What happens to metal inside a microwave oven? Why are the interior walls metal? Metal reflects microwaves and will conduct electric currents.
microwave ovens • metal in microwave ovens • microwaves • electromagnetic waves • microwave heating
What happens to metal inside a microwave oven? Why are the interior walls metal? Metal reflects microwaves and will conduct electric currents.
microwave ovens • metal in microwave ovens • microwaves • electromagnetic waves • microwave heating
Telescope Principles
Basic principles of telescopes: light-gathering ability and resolution
telescopes • astronomy • resolution
Basic principles of telescopes: light-gathering ability and resolution
telescopes • astronomy • resolution
Why is the Sky Blue?
Understanding how the different wavelengths of the colors in sunlight causes the sky to appear blue as it enters our atmosphere, is an important science concept.
why is the sky blue • inquiry based science • sunlight • where do rainbow colors come from • roygbiv
Understanding how the different wavelengths of the colors in sunlight causes the sky to appear blue as it enters our atmosphere, is an important science concept.
why is the sky blue • inquiry based science • sunlight • where do rainbow colors come from • roygbiv
Extraterrestrial planets, over 100 and counting.
How astronomers detected the first extrasolar planets and how it relates to the only previosuly known example, the Solar System.
extraterrestrial • exoplanet • star wobble • solar system • sun
How astronomers detected the first extrasolar planets and how it relates to the only previosuly known example, the Solar System.
extraterrestrial • exoplanet • star wobble • solar system • sun
How to Use Sunscreen Properly
With summer only a few short months away, it's time to start seriously thinking about your sunscreen. Here you learn how to use and buy sunscreen.
sun screen • sunscreen • sun tanning • safe tanning • natural sunscreen
With summer only a few short months away, it's time to start seriously thinking about your sunscreen. Here you learn how to use and buy sunscreen.
sun screen • sunscreen • sun tanning • safe tanning • natural sunscreen
What is Karma?
This article, the first in the series on 'Karma' explains the concept through material from the Temple of the Maitreya Buddha,true examples of karma in action, as well as guidance from the Holy Teacher.
sentendaido • karma • clash • saints • common
This article, the first in the series on 'Karma' explains the concept through material from the Temple of the Maitreya Buddha,true examples of karma in action, as well as guidance from the Holy Teacher.
sentendaido • karma • clash • saints • common
Dust! (Interstellar Medium, Part I)
Interstellar dust and its effects are discussed
interstellar medium • dust
Interstellar dust and its effects are discussed
interstellar medium • dust
Color Me Sexual
This article discusses how colors are viewed by many to affect all aspects of our lives, including our sexuality.
color • colors • sexuality • sensuality • sexual relationships
This article discusses how colors are viewed by many to affect all aspects of our lives, including our sexuality.
color • colors • sexuality • sensuality • sexual relationships
The Master Plan, part II
Part II reports on the "optical" range (infrared to X rays) observation facilities - existing or planned - within the 1999 and 2000 NSA decadal survey.
james webb • ngst • hubble • spitzer • sirtf
Part II reports on the "optical" range (infrared to X rays) observation facilities - existing or planned - within the 1999 and 2000 NSA decadal survey.
james webb • ngst • hubble • spitzer • sirtf
Building Solid Work Relationships
The best way to build good team work and rapport with co-workers is through the four Cs -- commonalities, connectivity, communication, and collaboration.
building solid teams • developing rapport and teamwork • building solid work relationships by developng rap • develping rapport with co-workers • building solid work relationships
The best way to build good team work and rapport with co-workers is through the four Cs -- commonalities, connectivity, communication, and collaboration.
building solid teams • developing rapport and teamwork • building solid work relationships by developng rap • develping rapport with co-workers • building solid work relationships
Microwaves Are Not Just For Cooking
Discover other uses for microwaves.
microwave • microwave transmission • communication methods • satellite transmission
Discover other uses for microwaves.
microwave • microwave transmission • communication methods • satellite transmission
Carl E Wieman - The Fifth State of Matter
Carl E Wieman shares the 2001 Nobel Prize for Physics for his discovery of the Bose-Einstein condensate, the fifth state of matter.
bose-einstein condensate • quantum mechanics • atomic physics • nobel • physicist
Carl E Wieman shares the 2001 Nobel Prize for Physics for his discovery of the Bose-Einstein condensate, the fifth state of matter.
bose-einstein condensate • quantum mechanics • atomic physics • nobel • physicist
Possible Cause Found for Frog Deformities: Sunlight
frogs • frog deformities • endangered species • endangered frogs • deformed frogs
frogs • frog deformities • endangered species • endangered frogs • deformed frogs
Strange New Worlds
As the number of planets discovered outside our solar system continues to grow, is it possible that one day soon we will find an Earth-like planet orbiting another star--perhaps even one with life?
space • planet • extrasolar • extraterrestrial • nasa
As the number of planets discovered outside our solar system continues to grow, is it possible that one day soon we will find an Earth-like planet orbiting another star--perhaps even one with life?
space • planet • extrasolar • extraterrestrial • nasa
The Glory and the Brockenspectre
Glories appear as a full circle, their coloured rings centered on the observer's shadow. Prior to the advent of regular high-altitude flight, the glory appeared only to those who ascended to high mountain elevations. Today, we can see glories regularly from aircraft flying in the sunlight above uniform cloud decks. A glory is only visible when sunlight is at the observer's back; therefore, they are always exactly opposite the sun.
weather • meteorology • glory • brockenspectre • atmospheric diffraction
Glories appear as a full circle, their coloured rings centered on the observer's shadow. Prior to the advent of regular high-altitude flight, the glory appeared only to those who ascended to high mountain elevations. Today, we can see glories regularly from aircraft flying in the sunlight above uniform cloud decks. A glory is only visible when sunlight is at the observer's back; therefore, they are always exactly opposite the sun.
weather • meteorology • glory • brockenspectre • atmospheric diffraction
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