Question

A light wave travels at a speed of 3.0 × 108 meters/second. If the wavelength is

7.0 × 10-7 meters, what is the frequency of the wave?

A 2.5 × 10-14 hertz

B 4.3 × 1014 hertz

C 1.7 × 10-14 hertz

D 5.1 × 10-14 hertz

Answer 1

i think the answer is D 5.1 × 10-14 hertz

Answer 2

the answer is b 4.3+ 1014 hertz