Which one of the following superpositions will result in beats? A)the superposit

Question

Which one of the following superpositions will result in beats?

A)the superposition of identical waves that travel in the same direction

B)the superposition of identical waves that travel in opposite directions

C) the superposition of waves that are identical except for slightly different amplitudes

D) the superposition of waves that are identical except for slightly different frequencies

Which one of the following will result in standing waves?

A) the superposition of waves that travel with different speeds

B) the superposition of identical waves that travel in the same direction

C) the superposition of identical waves that travel in opposite directions

D) the superposition of nearly identical waves of slightly different amplitudes

Explanation / Answer

1) D) the superposition of waves that are identical except for slightly different frequencies

beta frequency, f_beat = f1-f2

2) C) the superposition of identical waves that travel in opposite directions

we get standing due to over lap of identical waves move in opposite direction.

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