Question

calculate the frequency and wave number for the radiation of wavelength 750 nanometre ​

Answer 1

Answer:

Given :

λ=480nm=480×10

−9

m [∵1nm=10

−9

m]

c=3×10

8

m/sec

Frequency, v=

λ

c

=

480×10

−9

m

3×10

8

ms

−1

=6.25×10

14

s

−1

=6.25×10

14

Hz.

Just change and calculate