Question

(b) What is the frequency of violet light with a wavelength of 433 nm?
Frequency
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Answer 1

Step 1
(A)
We know speed of light is given by the formula-

Speed = wavelength x frequency

Now for the violet light speed of light is 3 x 10^8 m/sec.

We proceed now as follows-

Step 2
(B)
We know 1 nm = 10^-9 m

Now,frequency will be-

3 x 10^8 m /sec / 433 x 10^-9 m = 0.00692 x 1017 sec-1

Thus, the frequency of the violet light of given wavelength is
0.00692 x 1017 sec-1 .