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The displacements of two interfering li...

The displacements of two interfering light waves are `y_(1) = 2sin omega t` and `y_(2) = 5sin (omega t+(pi)/(3))` the resultant amptitude is

A

39 cm

B

`sqrt(39) ` cm

C

7 cm

D

`sqrt(29)` cm

Text Solution

Verified by Experts

The correct Answer is:
B
`A = sqrt(a_(1)^(2) + a_(2)^(2) + 2a_(1) a_(2) cos theta)`
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