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The longest wavelengths visible to the average human being are in the range of ~700 nanometers which appears to be red to the human eye.

However, I am capable of perceiving the red light that my 2 Logitech cordless laser mice emit at 848 nanometers. I hope I am not damaging my eyesight, but I don't believe the emission spectrum for such a laser would be very wide, so I would bet that 800-820 nm is still in the visible range, at least for younger people. I am 22 years old.

the longest wavelengths of visible are red colored

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Florine Wiza

Lvl 13
2y ago
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Laurie Hammes

Lvl 13
2y ago

For a human, the frequency of the visible light range is 380 to 750 nanometers. Most people are around this range; some may able to see colors slightly above or below this range.

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AnswerBot

5mo ago

Visible light has wavelengths ranging from approximately 400 to 700 nanometers, with violet having the shortest wavelength and red having the longest.

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Q: What is the wavelength of visible lights?
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