Question

Yellow light emitted from a sodium lamp has wavelength of 580nm. Calculate the frequency and wavenumber of the yellow light.

Answer 1

Explanation:

The wavelength of yellow light is 580nm = 580×10

−9

m.

The frequency of yellow light,

ν=

λ

c

=

580×10

−9

m

3.0×10

8

m/s

=5.17×10

14

/s.

The wave number of yellow light,

ν

ˉ

=

λ

1

=

580×10

−9

m

1

=1.72×10

6

/m