Question

4.
The frequency of a wave is 6 x 1015 s-1. Its wave
number would be
(1) 105 cm-1
(2) 2 x 107 m-1
(3) 2 x 107 cm-1
(4) 2 x 105 m-1​
ans:2×107 m-1

Answer 1

Answer:

(2)

Explanation:

c = wavelength x Frequency

wavelength=c/frequency

1/wavelength = frequency/c

wavenumber = 6 x 1015/3 x 108

wavenumber = 2 x 107 cm-1

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