Question

7. Two beams of light are incident on the same spot on a wall. Each beam comes from an independent robot. Does this create a superposition pattern on the wall?
8. Parallel light rays from a blaster are incident on a flat mirror. Can the rays reflected from the mirror converge on a single point? Explain your answer.

Explain two questions in 4 sentences.

Answer 1

7)

NO  

condition for  superposition pattern

phase difference between two wave must be constant with time or simply they must come from a coherence source but in this case they are independent so not possible to full this condition

Two sources are said to be coherent if they have exactly same frequency, and have zero or constant phase difference.

8.

NO

because light reflected from a flat mirror bounce back at same angle at which they fall on mirror  

so if two parallel ray fall on mirror after reflection they will bounce back   parallel to each other

see this figure