The wavelength of a wave traveling with a velocity of 420 ms‾¹ is 42m. What is its period?

A. 1.2 s
B. 1.0 s
C. 0.5 s
D. 0.1 s

Correct Answer:

Option D = 0.1 s

Explanation

V = fλ
f = (v)/λ = (420)/42 = 10 HZ
Period, T = (1)/F = (1)/10 = 0.1 secs