Question

An x-ray with a wavelength of 3.5 × 10^-9 m travels with a speed of 3.0 × 10^8 m/s. What is the frequency of this electromagnetic wave?

A. 9.52 × 10^-1 Hz
B. 8.57 × 10^16 Hz
C. 1.17 × 10^-17 Hz
D. 1.05 Hz

Answer 1

frequency= speed/ wavelength
f= 3.0 × 10^8 m/s/ 3.5 × 10^-9 m
=8.57x10^16
The answer is letter B. 8.57 × 10^16 Hz.