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Q.

Is it true that sometimes the image of the ball will not appear on the screen if the torch angle is changed?

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a

True

b

False

answer is A.

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Detailed Solution

The above statement is True.
If the screen is placed too far away from the ball, he will not see any shadows. Because the torch's light beam falls parallel to the screen on the ball, the ball does not obstruct the entire light from the torch and no shadow is formed. The torch is kept at a safe distance from the ball. This distances the source of light. As a result, not enough light reaches the ball.
Only if the ball, torch, and screen are all in the same straight line will an accurate shadow of the ball be formed. The illustration shows this.[44]

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