Radiation frequency.....?

Question

A microwave oven emits radiation at a wavelength of 0.500 cm. What is the frequency of this radiation?

a.2.00 s-1
b.1.50 × 106 s-1
c.6.67 × 10-7 s-1
d.1.67 × 10-11 s-1
e.6.00 × 1010 s-1?

Answer 1

Light moves at speed c = 3x10^8 m/s

The relationship between frequency (v) and wavelength (L) is given by:

v = c/L

0.500 cm = 0.0005m

Therefore,

(3x10^8 m/s) / 0.005m = 6.00x10^10 s-1.

The answer is e.

Answer 2

e.6.00 × 10^10 s-1?