A student wants to find the focal length of a concave mirror given to him. He focuses a distant object with this mirror, to obtain a sharp image. The chosen object should not be:

A building

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A tree

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A window

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The sun

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Solution

The correct option is D The sun
Concave mirror can converge all the light coming from the sun, which can be dangerous. Because it may lead to excessive heat so Sun is not used as object.

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A student wants to find the focal length of a concave mirror given to him. He focuses a distant object with this mirror, to obtain a sharp image. The chosen object should not be:

The correct option is D The sunConcave mirror can converge all the light coming from the sun, which can be dangerous. Because it may lead to excessive heat so Sun is not used as object.

The correct option is D The sun
Concave mirror can converge all the light coming from the sun, which can be dangerous. Because it may lead to excessive heat so Sun is not used as object.