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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
Where does temperature come from?
The term temperature (a construct) is a used to measure heat energy, to compare "hot" and "cold" things. A rock in the desert sun is hot. A fire is hotter. What's the difference? We devised a "scale" and developed instruments to measure "amounts of heat" to give us what we currently use as temperature. "The high today is going to be in the 80's." "Lead melts at a little under 330 degrees." The former is degrees F and the latter is degrees C. We need scales to talk about temperature. Use the link and begin your journey into how we look at heat (and non-heat, which is cold).
The light which comes from Florescent tubes is called COOL LIGHT. Another example is L.E.D. lights as well.
The light other than Halogen Lights is cool because Halogen Light is warm light.
What are the two waves that lie at the ends of the visible spectrum?
Red at the low frequency end and violet at the high frequency end.
What is the approximate wavelength range for visible spectrum?
A typical human eye will respond to wavelengths from about 390 to 750 nanometers.
(0.00039 to 0.00075 millimeter)
What are the two Parts Of The Electromagnetic Spectrum That Are Close To Visible Light?
On one side: infrared radiation. On the other side: ultraviolet radiation.
How much of the electromatic spectrum is visable light?
If you define the electromagnetic spectrum to begin at 60 KHz ... the radio
frequency used to distribute the signals that synchronize your "atomic" clock ...
and end with gamma rays at 1019 Hz, you've defined a frequency span of
about 47 octaves.
Out of that span, roughly ONE octave is visible to human eyes.
Is it true or false that only portions of visible light can be taken up by chlorophyll?
True, obviously the green part of the spectrum is not used which is why chlorophyll looks green when illuminated with white light.
Can you generate temperature from the light intensity of visible and invisible light?
You don't generate temperature. You generate heat. If something should happen to absorb
the heat, then you can measure the temperature of that thing and calculate how much heat
has been absorbed.
When heat travels through space from one place to another, it's traveling in the form of
invisible light called 'infrared radiation'.
We use that method to move heat, absorb it, and cause a temperature rise every day.
It's how we toast bread in a toaster.
Why do the lights on your 03 focus flash?
I think its some kind of thermionic fuse or resistor, maybe behind the glove compartment. A cheap item. I saw the answer before, it is not available now as far as I see
What colors are there when light bounces off a surface?
Any light that bounces off of the surface is the same color
as it was when it hit the surface.
How do you perceive the different frequencies of light waves?
Different frequencies of visible light are perceived as different colors.
Do radio waves have loger wavelenghts than light?
The shortest radio wave (300 GHz) is something like 1,300 times
as long as the longest visible light wave (750 nm).
What is the difference between the spectrum and a naked eye?
- the visible light spectrum is a continuum of radiation
- the human eye is only able to see three colors: red, green, and blue, and the brain interpolates the others
