What are wavefronts?

3 marks · Normal

A wave source produces 8 complete waves every second. Each wave has a wavelength of 0.25 m.

(a)

State the frequency of the wave.

[1 mark]

(b)

Calculate the time period of the wave.

[2 marks]

Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.

Show answer

(a) 8 Hz

(b) T = 1 / f = 1 / 8 = 0.125 s · must show working showing use of T = 1/f

Common mistakes: Using wrong equation for time period; Incorrect reciprocal

Show mark scheme and worked solution

Marking points

B1 (a) · 1 mark · States frequency as 8 Hz.

M1 (b) · 1 mark · Uses correct formula T = 1/f. (follow-through)

A1 (b) · 1 mark · Calculates time period as 0.125 s. (follow-through)

Worked solution

a) Frequency = 8 Hz.