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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

`39cm`

B

`sqrt(39)cm`

C

`7cm`

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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Knowledge Check

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