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Topic: What is the range of visible light?  (Read 6323 times)

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Offline s3a

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What is the range of visible light?
« on: October 21, 2009, 03:26:48 PM »
Is the range of visible light 380nm-750nm or 400-750nm?

Any input would be greatly appreciated!
Thanks in advance!
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Offline cliverlong

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Re: What is the range of visible light?
« Reply #1 on: October 21, 2009, 03:32:57 PM »
Wikipedia claims

http://en.wikipedia.org/wiki/Visible_spectrum

A typical human eye will respond to wavelengths from about 380 to 750 nm


I guess the cones in a particular eye will have some small impact on the range of wavelengths perceived by that eye.

Clive
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Offline Borek

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Re: What is the range of visible light?
« Reply #2 on: October 21, 2009, 04:01:40 PM »
I have heard some people are able to see IR emitted by TV remote controllers :)
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Offline gregdwulet

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Re: What is the range of visible light?
« Reply #3 on: October 21, 2009, 04:55:17 PM »
^^That would suck...

And I verified cliverlong's answer of 380-750 in my book (Zumdahl)
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Offline Borek

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Re: What is the range of visible light?
« Reply #4 on: October 21, 2009, 06:22:49 PM »
Why? That's actually quite an interesting observation. It was discussed somewehre else, I think at physicalforums, and someone even stated he catched his GF using remote to find her keys in the dark :)
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