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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 year was the visible light spectrum discovered?
The exact year is shrouded in mystery, but there is considerable archaeological evidence
to support the theory that the discovery took place almost immediately after life on earth
developed eyes.
Does the amount of light increase if more and more flashlight beams are combined into one beam?
I'm not sure what you mean by 'the amount of light',
or how you might plan to 'combine' several beams.
When more flashlights shine on a surface, the intensity of
illumination on the surface increases.
How are visible light infrared light x-rays gamma rays microwaves and radio active waves related?
Those are all examples of electromagnetic radiation ... the same physical phenomenon
but with different wavelengths (frequencies) and different made-up names.
What is the difference between natural light and artificial light?
Natural light is light made by things in the nature (animals, plants etc.), and the sun.
Artificial light is human made light.
Where do visible light waves come from?
There are a great many sources of visible light.
They include:
-- stars
-- fire
-- volcanos
-- lightning
-- incandescent lamp filaments
-- electric sparks/arcs
-- fireflies
-- excited/ionized gas
-- flashlights
-- stove burners
Is the spectrum of an element limited to the visible region of the electromagnetic spectrum?
No. The emission and absorption spectrum covers everything from UHF radio to X-rays.
(There are no energy level transitions that correspond to the low energy HF or VHF
radio bands and below. The lowest-energy transition is the one at 1420 MHz/21 cm.)
Astronomers study as much of the spectrum of radiation as they can, and the visible spectrum is only a small segment of it.
What color does not absorb all wavelength of light?
Black is the only color that does absorb all wavelengths of light.
White is the color that reflects all wavelengths of light.
All other colors absorb only certain wavelengths of light and reflect the rest.
What has the longest wave length a Gamma wave microwave visible light or x-ray?
From that list, microwaves have the longest wavelength.
Those four items would be arranged by wavelength like this:
- Gamma ray (shortest)
- X-ray
- Visible light
- Microwave (longest)
How much candle power in 360 lumen?
Lumen and candlepower are not the same thing. Lumen measure the of light surrounds, like you would light a room with a lamp. Candlepower measures the light in a beam, like a flashlight beam.
With a few assumptions you can convert lumen to candlepower. With these assumptions 360 lumen would be 28.6 candlepower.
It will be right to say that only principles of light microscopy keeps light focused and scatters wavelengths of visible light for the human eye to see.
If a ray of light has a wavelength of 465 nanometers, what shade of visible light does it produce?
Blue
Does visible light have a higher frequency than gamma rays?
No, visible light has a lower frequency than gamma rays. Gamma rays are the highest frequency of electromagnetic energy. They are above X-rays.
How does a microwave use light energy?
Only as a light bulb to illuminate the chamber and in the control display to tell what it is doing.
If colors have different wavelengths do they have different frequencies and temperatures?
Yes, light is electromagnetic waves.
The longest wavelengths have the lowest frequencies and the lowest temperatures.
The shortest wavelengths have the highest frequencies and the highest temperatures.
