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Waves quick check

A quick check of 3 questions. After you submit, each question shows the right answer and why.

3 of 10 questions, Advanced level. Aimed at the Advanced level, your current depth. Questions you have not answered yet come first.

Show all 10 questions

ScientistQuestion 1 of 3

Two identical sound waves of amplitude 1 unit arrive at the same point exactly half a cycle (π radians) out of phase. What is the resulting amplitude?

AdvancedQuestion 2 of 3

Two waves of equal amplitude A = 1 and the same frequency differ in phase by φ = π/2 radians. What is the amplitude of their sum, to two decimal places?

AdvancedQuestion 3 of 3

A string 0.50 m long is fixed at both ends. What is the wavelength, in metres, of its third standing-wave mode (n = 3), to two decimal places?