Question

calculate frequency and wave number of light having wavelength 400nm​

please solve this question as Soo n as you can tommorow is my exam please help me​​

Answer 1

Answer:

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.

Answer 2

Answer:

frequency = 7.5*10^14

wave no= 0.022