Consider the following statements about interference of light.
$A$-When crest of one wave coincides with crest of another wave at a point,this point is a point of destructive interference.
$B$-Two coherent sources emit waves of the same frequency with a constant phase difference.
Choose the correct option from the following.

  • A
    Both statements $A$ and $B$ are wrong.
  • B
    Statement $A$ is correct while statement $B$ is wrong.
  • C
    Statement $B$ is correct while statement $A$ is wrong.
  • D
    Both statements $A$ and $B$ are correct.

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