The figure shows two point sources of light, A and B.B emits light waves that are + $\pi$ radians out of phase with the waves from A.A is 3$\lambda$ from P.B is 5$\lambda$ from P.($\lambda$ is the wavelength.) The phase difference between waves arriving at P from A and B is:
A)0 rad.
B)( $\pi$ rad.)
C)2 $\pi$ rad.
D)3 $\pi$ rad.
E)4 $\pi$rad.

Question

The figure shows two point sources of light, A and B.B emits light waves that are + $\pi$ radians out of phase with the waves from A.A is 3$\lambda$ from P.B is 5$\lambda$ from P.($\lambda$ is the wavelength.) The phase difference between waves arriving at P from A and B is: 
A)0 rad. 
B)( $\pi$ rad.) 
C)2 $\pi$ rad. 
D)3 $\pi$ rad. 
E)4 $\pi$rad.

Quizplus · Accepted Answer

The Answer of The figure shows two point sources of light, A and B.B emits light waves that are + $\pi$ radians out of phase with the waves from A.A is 3$\lambda$ from P.B is 5$\lambda$ from P.($\lambda$ is the wavelength.) The phase difference between waves arriving at P from A and B is: 
A)0 rad. 
B)( $\pi$ rad.) 
C)2 $\pi$ rad. 
D)3 $\pi$ rad. 
E)4 $\pi$rad.

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