If an electromagnetic wave has a frequency of 6 x 105 Hz, what is its wavelength? Use 1 = The speed of light is 3 x 108 m/s.
f
v
A. 2 x 10-3 m
B. 5 x 1014 m
C. 5 x 102 m
D. 2 x 1012 m

500 m

Explanation:

Applying,

v = λf Equation 1

Where v = speed of light, λ = wave length, f = frequency of light.

make λ the subject of the equation

λ = v/f Equation 2

From the question,

Given: v = 3×10⁸ m/s, f = 6×10⁵ Hz

Substitute these values into equation 2

λ = 3×10⁸/6×10⁵

λ = 500 m