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Visible Light Spectrum
Join us here to ask and answer questions on the "illuminating" topic of the visible light spectrum. This includes questions about: refraction, reflection, rainbows, prisms, mixing colored lights, and the spectrum of colors that make up white light.
1,220 Questions
What month is the constalation lacerta visible?
The constellation Lacerta is typically visible in the northern hemisphere during the months of September through December. It can be best seen in the evening sky during these months.
What are 3 forms of electromagnetic radiation with a wavelength higher than visible light?
- Ultraviolet radiation: has shorter wavelengths than visible light.
- X-rays: have even shorter wavelengths than ultraviolet radiation.
- Gamma rays: have the shortest wavelengths and highest energy among electromagnetic radiation.
Radio waves have the lowest frequency in all of the electromagnetic spectrum. The next higher frequency energy is microwave, visible light including ultraviolet, infrared, X-ray, then gamma ray
What are 3 things that visible light can be emitted by?
stars, flashlights, toasters, CFLs, LEDs, fireflies
What color on visible spectrum is the hottest?
On the visible spectrum, blue is the hottest color. This is because blue light has a higher energy level than other colors in the visible spectrum, such as red or yellow. Hot objects, like stars, emit more of their energy in the blue end of the spectrum.
How does a ripple tank make the waves more visible?
A ripple tank creates waves by vibrating a surface with a motor underneath the tank. This makes the surface of the water move up and down, creating the waves that are more visible due to the light shining from above, which reflects off the waves and reveals their patterns and behaviors.
infrared, red, orange, yellow, green, blue, purple, ultraviolet. The sun has a lot of different colors in it, all you have to do is take a prism, and put it in front of a beam of sunlight, to see that the white light coming from the sun has many parts.
Just realize humans cannot see infrared or ultraviolet.
Which portion of the visible spectrum has the longest wave length?
Red light has the longest wavelength in the visible spectrum.
What wavelengths are longer than light but shorter than radio waves?
Infrared light, microwaves and radio waves have wavelengths longer than visible light. Radio waves have the longest wavelength.
Which light has a lower frequency than an infra-red radiation?
Visible light has a lower frequency than infrared radiation. Visible light ranges in frequency from approximately 430 THz (red light) to 750 THz (violet light), while infrared radiation has frequencies below 430 THz.
Nikola Tesla used a high-frequency electromagnetic field to transmit electricity wirelessly, known as Tesla coils. When he held a light bulb near the coil, the electromagnetic field induced a current in the bulb, causing it to light up without the need for direct electrical connections.
When will be the Mercury lamps will be stopped in market?
If you are referring to fluorescent and CFL lamps, it can never be totally eliminated. These are mercury vapor arc lamps using a phosphor to turn the UV to visible light. They have reduced the mercury dramatically, but it can't be totally eliminated.
If all fluorescent and CFL lamps were banned and lighting was all converted to LED then use of mercury could be stopped. However most LED lamps cost at least ten times what CFL lamps cost.
The last color you can see at the red end has the lowest frequency,
longest wavelength, least energy per photon.
The last color you can see at the violet end has the highest frequency,
shortest wavelength, most energy per photon.
Is the electromagentic spectrum can only be seen in visiable light?
Some electromagnetic waves are invisible and some aren't. Light is electromagnetic radiation, and we can see it. Radio waves aren't, and neither are x-rays or cosmic rays. All of these are electromagnetic waves.
Light can do many things. some of the thing are that light can give things color, can make solar calculators work, can make cars move, and also it can help plants grow. That's ome of the things light can do.
What are the primary of colors of light?
This Q&A is about light colours. Paint colours are substances, and different from light colours.
If you hold up a glass prism to a beam of sunlight, you'll see the light form a rainbow of colours. This is called the spectrum. It consists of all the colours that make up "white" light.
Although you might be able to see seven colours in the spectrum, the white light is really made up of three basic colours. These are called the primary colours because they cannot be made from any other colours. The primary colours of light are red-orange, green, and violet blue. The other colours you see in spectrums or rainbows are made by a mixture of the primary colours.
When the naked eye looks at the spectrum, it can see three mixed colours, which are called secondary colours. The secondary colours in light are green-blue, yellow, and magenta-red. You can produce these colours by mixing the primary colours in certain combinations.
How much of the electromagnetic spectrum is taken up by visible light?
The EM spectrum ranges from very long radio waves at around 1000m or longer, to gamma rays at around 0.01 nanometers (nm). The visible part of the spectrum (for human eyes) ranges from 700 nm (red) to 400 nm (violet). One nanometer = 10-9 meter.
You may sometimes find reference to Angstroms, which used to be used for this range before SI was fully established. One Angstrom is 10-10 of a meter, ie 0.1 nm, so the range of visible light would be 7000 to 4000 Angstroms.
There is a nice diagram showing the visible range in the total spectrum, at Wikipedia
http://upload.wikimedia.org/wikipedia/commons/f/fl/EM_spectrum.svg
What type of light bulb converts ultraviolet waves into visible light?
A fluorescent light bulb converts ultraviolet waves into visible light using a phosphor coating inside the bulb. When the UV light hits the phosphor coating, it emits visible light.
What minerals emit visible light when exposed to X-rays?
Minerals that emit visible light when exposed to X-rays include some types of diamonds, certain sulfides like willemite and sphalerite, and various fluorides such as fluorite. This phenomenon is called X-ray luminescence or X-ray-induced luminescence and is used in mineral identification and fluorescence studies.
What colour of the spectrum has the greatest wavelength?
The longest visible wavelength is that of the last color
you can see on the red end of the spectrum.
Is the visible light spectrum between radar waves and xrays?
No, the visible light spectrum falls between infrared and ultraviolet light on the electromagnetic spectrum. Radar waves have longer wavelengths than visible light, while X-rays have shorter wavelengths.
What are the differences between xray and visible light?
X-rays have shorter wavelengths and higher energy than visible light. X-rays are used for medical imaging as they can penetrate tissues, while visible light is used for photography due to its ability to capture color and detail. X-rays are ionizing radiation, meaning they can damage biological tissues, so they are used with caution.
Radio waves, visible light, infrared rays, and the waves that heat food in a microwave oven are forms of electromagnetic energy, due to varying wavelengths and frequencies. Ultraviolet rays and X-rays are forms of ionizing radiation, which have higher energy levels and can impact living tissue at the cellular level, making them potentially harmful in excess.
What are facts about visible light?
Light is a form of electromagnetic energy. Visible light ranges through all the colors of the rainbow - red, orange, yellow, green, blue and violet. Light is generally considered to be those wavelengths and also some wavelengths just below red (infrared or IR) and just above violet (ultraviolet or UV). Light has an energy associated with it, and the lowest energy light is at what is called the lower end of the spectrum, which is the red end. The higher energy light is at the higher end of the visible spectrum, the purple (or violet) end. Higher energy light has a higher frequency and a shorter wavelength than lower energy, which has a lower frequency and a longer wavelength. Light, because it is electromagnetic energy, is different from mechanical energy, like sound (which is mechanical energy). Light can travel through a vacuum. The speed of light in a vacuum is a constant, no matter what frame of reference the observer has, and that is exactly 299,792,458 meters per second (about 186,282.397 miles per second). A link is provided to the Wikipedia article on light in case you wish to do some additional reading. And there is always WikiAnswers for more questions.
It is part of the electromagnetic spectrum.
It has the characteristics of a wave and a particle.
The photon is the force carrier.
It travels about 300,000 kilometers per second.
It can be refracted, reflected or absorbed.
It's energy is used in photosynthesis and in our eyes.
It has pressure, this can be increased to make lasers, etc.
The SI unit of measure is the candela.
