Question

Which of the following is a correct statement? (1 point)

- Two waves of the same frequency interfere

constructively only if their path difference

is an even integral multiple of their

wavelength. - Two waves of the same frequency inerfere

destructively if their phase difference is

an odd integral multiple of*180*� - Two waves of the same frequency interfere

destructively only if their path difference

is an odd integral multiple of their wavelength. - None of the other choices are correct.
- Two waves of the same frequency interfere

constructively only if their phase

difference is*0*�

Answer #1

**correct option is part (B)**

**Two waves of the same frequency inerfere destructively
if their phase difference is an odd integral multiple of
.**

**because in destructive interference two waves combines
in the opposite phase, hence phase difference must be equal
to ,
,
,....and
so on.**

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