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Plane parallel wavefornts encounter the ...

Plane parallel wavefornts encounter the interference one medium and another as shown below The wave speed is different in the two media.
what will happen to the distance between wavefront and the direction of travel wavefronts as the waves enter the second media?

A

the distance between wavefronts remains unchanged but the directionof wavefornt changes.

B

the distance between wavefronts and the direction of wavefront both remains unchanged

C

the distance between wavefronts and the direction of wavefront both changed.

D

the distance between wavefrontschanged but the directionof wavefornt unchanges.

Text Solution

Verified by Experts

The correct Answer is:
C
because wave length and direction of progation changes.
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