What is the frequency of light having a wavelength of 4.50 x 10-6 cm?

Q. What is the frequency of light having a wavelength of 4.50 x 10-6 cm?

A.            2.84 x 10-12 s-1

B.            2.10 x 104 s-1

C.            4.29 x 1014 s-1

D.            6.67 x 1015 s-1

Answer: 6.67 x 1015 s-1