Exam-style question
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If a wave has a wavelength of 0.5 m and travels at a speed of 150 m/s, what is its frequency?.
- A.300 Hz
- B.75 Hz
- C.150 Hz
- D.100 Hz
Model answer
What a good answer should say
- 300 Hz
Explanation
Why this works
The frequency (f) can be calculated using the formula v = f × λ. Rearranging gives f = v / λ.
Substituting the values, f = 150 m/s / 0.5 m = 300 Hz. Therefore, the frequency is 300 Hz.
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