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What is the frequency of a helium-neon laser with a wavelength of 632.8 nm? The speed...

What is the frequency of a helium-neon laser with a wavelength of 632.8 nm? The speed of light is 3.00 × 108 m/s.

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Answer #1

wave length = 632.8nm = 632.8*10-9 m

velocity c= 3*108 m/sec

Frequency f = C/

                  = 3*108/632.8*10--9

                  = 0.00474 *1017 Sec-1

                 = 4.74*1014 Sec-1 >>>> answer

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