Question

Wondering if someone can please explain why this question is unsound;

Given that v= frequency x lambda and the frequency of a wave under investigation is 15Ghz with a wavelength of 0.2m, select the correct answer below.

a. v= 7.5 x 10^1 0 m/s
b. None of these answers are correct.
c. v= 1.3 x 10^-11 m/s
d. The question is unsound.
e. v= 3x10^9 m/s

Answer 1

Explanation:

The question is sound. The frequency and wavelength are given so you can solve for wave's velocity. It's just a matter of changing the notation.

$v = \nu \lambda = (15×10^9\:\text{Hz})(0.2\:\text{m})$

$= 3×10^9\:\text{m/s}$