Question

Two point coherent sources of light S and S are placed on a line as shown. P and Q are two points on that line. If at point P maximum intensity is observed then maximum intensity should also be observed at In the figure of assertion the distance $\left|S_{1}P-S_{2}P\right|$ is equal to distance $\left|S_{2}Q-S_{1}Q\right|$.

• A. If both assertion and reason are true and reason is the correct explanation of assertion
• B. If both assertion and reason are true but reason is not the correct explanation of assertion
• C. If assertion is true but reason is false
• D. If both assertion and reason are false

Answer 1

Answer: (B)

If both assertion and reason are true but reason is not the correct explanation of assertion

Answer 2

If maximum intensity is observed at P then for maximum intensity to be also observed at Q, S and S must have phase difference of 2 m$\pi$ (where m is an integer).