The Figure Shows Two Point Sources of Light, a and B

question 15

Multiple Choice

The figure shows two point sources of light, A and B, that emit light waves in phase with each other. A is a distance of 3λ from point P. B is distant 5λ from P. (λ is the wavelength.) The phase difference between the waves arriving at P from A and B is ​ ​

• A)0 rad.
• B)π rad.
• C)2π rad.
• D)3π rad.
• E)4π rad.

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