The wave number of a beam …
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Yogita Ingle 4 years, 11 months ago
Wavelength of a beam of light =400 cm-1; 'v = 400 cm-1
v =1 /λ
λ = 1/v = 1/400 cm = 2.5 x 10-3 cm
= 2.5 x 104 nm.
Calculation of frequency
c = vλ
v = c /λ = cv = 3 x 1010 cm s-1 x 400 cm-1
= 1.2 x 1013 s-1
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