Look at the diagram given below. It explains the working of a periscope. A periscope makes use of plane mirrors. A simple periscope can be used to see over obstacles such as walls. a) What is the nature of image formed when we see through a periscope? b) Give reason for the question asked in part ‘a’. c) Will the image be larger, smaller or of the same size as the object? Why?

a) The image formed in the periscope is a virtual image and erect. Light is always reflected from the mirrors which are present at the two edges of the periscope. Hence, the image formed in the periscope is not real it is virtual. b) As two plane mirrors are used in the periscope. These mirrors are fitted into each end of the tube at an angle of exactly at 45 ° , so that they face each other. The image formed will be upright, virtual, and same size. c) The size of the image is the same as the size of the object, as plane mirrors are used in periscope.

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What is periscope is used for?

Important Questions on When Light Reflects

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Science>Physics>When Light Reflects>Illusions in the Mirror

How are the two plane mirrors in a periscope arranged with respect to one another?

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Science>Physics>When Light Reflects>Illusions in the Mirror

Kaleidoscope is based on multiple reflection of light.

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Science>Physics>When Light Reflects>Illusions in the Mirror

How many plane mirror strips are there in a kaleidoscope? How are they arranged?

HARD

Science>Physics>When Light Reflects>Illusions in the Mirror

Explain the working of a periscope. Give its uses.

MEDIUM

Science>Physics>When Light Reflects>Illusions in the Mirror

The statement given is incorrect. Write the correct statement.
Kaleidoscope is used by barbers to show the back of the head.

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Science>Physics>When Light Reflects>Illusions in the Mirror

Which of the following is used to make a periscope?

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Science>Physics>When Light Reflects>Illusions in the Mirror

How are the two plane mirrors in a periscope arranged with respect to sides of the tube ?

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Science>Physics>When Light Reflects>Illusions in the Mirror

The idea of number of images formed by mirrors placed at an angle to one another is used in a _____ to make numerous beautiful patterns.

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Science>Physics>When Light Reflects>Illusions in the Mirror

What is a kaleidoscope? What is its use?

EASY

Science>Physics>When Light Reflects>Illusions in the Mirror

We find a periscope on a _____.

MEDIUM

Science>Physics>When Light Reflects>Illusions in the Mirror

What is a kaleidoscope?

MEDIUM

Science>Physics>When Light Reflects>Illusions in the Mirror

Look at the diagram given below. It explains the working of a periscope. A periscope makes use of plane mirrors. A simple periscope can be used to see over obstacles such as walls.
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