mcq physics

What is the wavelength of the visible spectrum?  (1) 1300 A°–3000 A°  (2) 3900 A° – 7600 A°  (3) 7800 A° – 8000 A°  (4) 8500 A° – 9800 A°  Answer: (2) The visible spectrum is the portion of the electromagnetic spectrum that is visible to (can be detected by) the human eye. Electromagnetic radiation in … Read more

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