Same 2 cm water waves meet gap A, 10 cm wide, and gap B, 2 cm wide. Which gap produces more spreading behind the barrier?

Two rope pulses, +4 cm and -3 cm, exactly overlap. What is the rope's displacement at that instant?

The circles show the crests from two identical, in-phase sources S1 and S2 in a ripple tank at one instant. What is observed at point X?

A student outside an open classroom door can hear voices clearly but cannot see people inside. Which explanation fits best?

The diagram shows the same waves passing through two labeled gaps. Which gap bends the wavefronts more?

Two rope pulses, -5 cm and +2 cm, exactly overlap. What is the displacement of the rope?

At point Y, a crest from one ripple-tank source arrives with a trough from the other source. What happens at Y?

A wave pulse strikes a straight wall and travels back through the same medium. Which wave behavior is this?

Same 1 cm waves reach gap A, 8 cm wide, and gap B, 1 cm wide. Which option correctly predicts the pattern?

Two rope pulses, +6 cm and -2 cm, exactly overlap. What displacement results?

At point Z, two identical waves from coherent sources arrive exactly in step. Which term describes the result?

Ocean waves enter a harbor through a narrow opening in a breakwater. Why can waves reach boats not directly in front of the opening?

The figure shows identical waves passing through the two labeled gaps. Which gap gives stronger diffraction?

Two downward rope pulses of -4 cm and -3 cm exactly overlap. What is the displacement?

At point M, a trough from S1 arrives at the same time as a trough from S2. What should the water do there?

A straight water wave crosses from deep water into shallow water at an angle. Its speed changes and the wavefront changes direction. What is this called?

The diagram shows the same waves reaching two labeled gaps. Which statement is correct?

Two rope pulses, +3 cm and -8 cm, exactly overlap. What displacement results?

The circles show the crests from two identical, in-phase sources S1 and S2 at one instant. What is the water's displacement at point N at this instant?

Two speakers playing the same tone make a spot in the room unusually quiet. What best explains the quiet spot?

The figure shows the same waves encountering two labeled gaps. Which gap produces the greater spreading?

Two rope pulses, -6 cm and +4 cm, exactly overlap. What is the rope's displacement?

At point P, a crest from one source lines up with an equal trough from the other. After that instant, what happens to the waves?

If a wave with a longer wavelength and a wave with a shorter wavelength pass through the same narrow opening, which diffracts more?

Same 3 cm waves meet gap A, 9 cm wide, and gap B, 3 cm wide. Which choice explains the result?

Two rope pulses, +7 cm and -5 cm, exactly overlap. What displacement results?

A pulse of +2 cm on a rope meets a pulse of -2 cm. Which statement describes the exact overlap?

A bright ripple-tank line forms where crests from two sources repeatedly meet. Which process makes that line?

A radio signal can be received behind a building even when the transmitter is not in a direct line of sight. Which wave behavior helps explain this?

Two identical waves arrive exactly out of phase at a point. What must be true at that point for complete cancellation?