Question

What is the frequency of an electromagnetic wave that has a wavelength of

7.6 x 10^-6 m in a vacuum? (The speed of light in a vacuum is 3.00 x 10^8
m/s.)
A. 2.3 x 10^3 Hz
B. 1.3 x 10^5 Hz
C. 4.0 x 10^13 Hz
D. 2.5 x 10^-14 Hz

Answer 1

D. 2.5 x 10 ^-14 Hz

Step-by-step explanation:

Use wavelength formula: v = f x wavelength

Rearrange formula for frequency.

f = wavelength / v

f = 7.6 x 10 ^-6 / 3.00 x 10 ^8

f = 2.5 x 10^-14 Hz