Articles related to "Visible Light"



What is Radio Astronomy?
In addition to visible light, astronomers study radio waves from the Sun, planets, stars, galaxies, and other celestial objects.
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Fraunhofer Lines, the Sun, Elements and Universe
Understanding the sun, solar systems, and the universe is a constant and intense quest of astronomers. Spectroscopes and Fraunhofer's lines reveal the universal elements.
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Invisible Astronomy
In addition to visible light, astronomers use ultraviolet, infrared, radio waves, X-rays and gamma rays to study planets, stars, galaxies, and other celestial objects.
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Newton's Theory of Colour
Shine white light through a glass prism and the emerging rays of light will spread out in a rainbow of colours.
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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?
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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.
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What Are Electromagnetic Waves?
Visible, ultraviolet, and infrared light as well as X-rays and all types of radio waves are types of electromagnetic waves or electromagnetic radiation.
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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.
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SPECIAL REFLECTIONS
Special Reflections explains briefly how gemstones get their colors, then describes cat's eyes and asterism, which are two special light effects.
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Gamma Ray Bursters
Gamma ray bursters are among the most violent phenomena in the visible universe. In fact, if one occurred near the Earth it would incinerate the atmosphere in seconds. Fi
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How Reiki Works
Often, people are confused when alternative practitioners describe the healing qualities of Reiki.
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Looking down the barrel
Gamma Ray Bursts (GRB's) puzzled astronomers for decades since their discovery by the Vela nuclear test surveillance satellites in the 60's. Scientists think now the mystery has been solved, adding yet another (unlikely) threat to the catastrophes lurking out there.
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Why Is Ultraviolet Light Harmful?
Ultraviolet light, a frequency of sunlight, damages skin immediately and over time.
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Most Distant Object in the Universe to Date
A gamma-ray burst with a redshift of 8.2 becomes the earliest and most distant object ever discovered.
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The Chandra X-ray Observatory
Capturing the visible light spectrum through the Hubble telescope shows amazing images, but the Chandra X-ray telescope captures even more impressive images.
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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.
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Solar Urticaria
Solar urticaria is a rare skin disease presenting with red, itchy hives within a few minutes of exposure to sunlight.
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The Master Plan, part I
Space research may appear as a somewhat chaotic dispersion of disparate efforts, space probes, ground telescopes, space telescopes etc. Yet this is not completely true. Scientists manage to arrive to certain consensus, while politics has, the last say. First of a two part article, within a series of related installments.
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Esoteric Art
Art that portrays the unseen spiritual world is created by seers and visionary artists that are inspired by sensitive perception.
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Jupiter Hit by Comet or Asteroid
An amateur astronomer reports first sighting of new impact evidence on the solar system's largest planet.
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Lightning Bugs Making Their Annual Appearance
Americans who grew up or live in the eastern half of the country have probably at some point witnessed a summer evening light show performed by the firefly.
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Mercury in Energy-Saving Bulbs
All fluorescent light bulbs contain mercury that can pose a health risk if broken bulbs are improperly handled or waste bulbs are not correctly recycled
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Preserving Your Family Photos
Photographs are an excellent tool for the family historian, but only if they are well-preserved. Here are tips for preserving your own family photos.
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Seeing Snow Cover from Space
The view from space provides scientists on the ground a good look at snow cover and the weather's effects on land surface features.
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The Violet Flame
The Violet Flame has become one of the most effective meditations in New Age thinking today. This article explores its roots and how it can help you.
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Types of Stars
Stellar spectral classification helps astrophysicists understand the lives of stars.
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Another Kind of Filtration?
Potentially harmful microorganisms exist in all saltwater systems. A UV sterilizer can help eliminate harmful bacteria, algae spores, and protozoa in a marine system.
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Astronomy of a Different Color: New Wavelengths Open New Windows
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Blackbodies in Astrophysics
The wavelengths of the electromagnetic radiation emitted by an ideal blackbody radiator depends only on the temperature.
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Can Hubble Space Telescope See Flag on the Moon?
Basic physics provides a formula for calculating the smallest detail the Hubble Space Telescope can resolve on the surface of the Moon. It is larger than a flag.
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Creating a Tropical Terrarium
Many tropical herps (reptiles and amphibians) need a humid, specialized environment. Learn to assemble a home for some lizards, snakes and tree frogs.
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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.
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Green Anole: Right Pet For You?
These small, agile lizards do change colors from green to brown but Anolis carolinensis are not true chameleons. See the common traits and needs of keeping anoles.
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How to Identify Parts of a Compound Microscope
Trying to learn the parts of a compound light microscope? Here are clear descriptions and detailed photos to help you become a master of the microscope.
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Lighthouses
Who would have thought that you could learn something about science from lighthouses?
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Lightshelves Save Lighting Energy
Daylight is the best light for people to work in. Reflectors, or lightshelves, at windows can direct daylight deep into a building, allowing lights to be switched off.
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Lycopene or Rhodopurpurin
As an antioxidant, it is anticarcinogenic and heart-protective. It is also a potent antibacterial and antifungal agent.
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New Instruments Improve Control Of Air Pollution
Instruments that use light to make precise measurements of gases and vapors in flues, where probes can't be used because of corrosion, can help control air pollution.
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Photorejuvenation and Thermage
The signs of aging show that you want to regain the sparkle of youth, but not ready to submit to the plastic surgeons' cold steel. Try non-invasive methods.
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Plantskins
HO OH HO O HO HO OH OH O O O HO OH HO HO …. This is not the laughter of a villain. The sequence continues and finally gives cellulose structure.
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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.
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Sunglasses Give UV Protection of the Eyes
Ultraviolet light not only damages skin, exposure to UVA and UVB causes eye damage too. It is important to choose sunglasses carefully to reduce damage caused by UV rays.
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The Astronomy of the Local Group
The Milky Way Galaxy is one of 30-35 galaxies that are in the space neighborhood known as the Local Group. Here are some interesting facts about this "neighborhood."
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The Hubble Space Telescope
Astronomy was considered an arcane hobby. But after Hubble returned some images that looked like Art, that perception was changed to awe.
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Tips for Using a Compound Light Microscope
Students new to using microscopes typically get frustrated when first trying to look at specimens. Here's how to overcome some of the most common problems.
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What Exactly is a Galaxy?
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What Is a Compound Light Microscope?
Learn about the features of a compound light microscope, the importance of contrast and how to determine total magnification of ocular and objective lenses.
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What is Laser?
The study of laser technology involves the study of principles of light energy in physics.
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An Introduction to Solar Energy
Solar power is the ultimate renewable energy source. Here is an introduction to the basic science that makes all solar energy technologies possible.
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Are Muslims Allowed to Celebrate Halloween?
In Islam, Muslims only have two holidays. They are Eid Al-fitr and Eid Al-adha. It is forbidden for a Muslim to join in a celebration that is not one of those two days.
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