Which of the following statements best states the principle which accounts for t

Question

Which of the following statements best states the principle which accounts for the phenomenon of interference? a. The necessary and sufficient condition for the interference of two waves is that they overlap in space and travel at the same velocity. b. When two or more waves overlap, the resultant displacement at any point and at any instant may be found by adding the instantaneous displacements that would be produced at the point by the individual waves if each were present alone. c. Since energy is conserved, for every region in which destructive interference occurs, there must be a corresponding region in which constructive interference occurs. d. Interference requires that the two interacting waves be in phase. e. It is not possible to observe interference effects using a single light source.

Explanation / Answer

The correct options will be a, b, c

If the waves will have different velocities, they won't be able to interfere. The resulting dispalcement is the addtion of the instaneous displacement of the two waves. In the case of interference, the total energy is conserved.

The wrong options will be d, e

The interacting waves need not to be in phase, Only the phase difference the two waves should be same. They should be coherent. It is possible to observe the interference by using the division of amplitude or division of wavefront from the single light source.

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