Question

In which of the following cases will the boy be able to see the light bulb through the tube?

• A. Only I
• B. Only II
• C. Both I and II
• D. Neither I nor II

Answer 1

The correct option is A

Only I

Light travels in a straight line. We call this rectilinear propagation of light.


In case II, the pipe is bent. So the boy won't be able to see the bulb. Because light can't bend and reach his eyes.

In case I, the pipe is straight. So the boy will be able to see the bulb.

Remember: light travels in a straight line. This is called rectilinear propagation.