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

question 44

Multiple Choice

The figure shows two point sources of light, A and B. B emits light waves that are +π radians out of phase with the waves from A. A is 3λ from P. B is 5λ from P. (λ is the wavelength.) The phase difference between 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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