Periscope is used to :

magnify extremely small objects into bigger images

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observe the distant images such as planets and stars

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analyse the spectrum formed by the sunlight

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view objects placed at a higher level from a position at lower level

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Solution

The correct option is D view objects placed at a higher level from a position at lower level
Periscope is used to view objects placed at a higher level from a position at a lower level.

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M

is placed at a distance of

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Periscope is used to :

The correct option is D view objects placed at a higher level from a position at lower levelPeriscope is used to view objects placed at a higher level from a position at a lower level.

The correct option is D view objects placed at a higher level from a position at lower level
Periscope is used to view objects placed at a higher level from a position at a lower level.