Question Detail
Question
According to the Doppler Effect, if an observer is moving towards a stationary sound source, what happens to the observed frequency compared to the emitted frequency?
Correct Answer
Option C is the correct answer.
Detailed Explanation
Page 16, under 'Case 1: Source constant, observer moving towards it,' explains that the observed frequency f' = f + (v₀/v)f, which means it increases.
Hint
Think about how the relative motion changes the rate at which wave fronts are encountered.