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Light — Science STD 8 — Question

Gujarat BoardEnglish MediumSTD 8ScienceLight2 Marks
Question
What is a periscope? How many mirrors are there in a periscope?
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Answer

A periscope is a device that reflects the reflected ray again. It consists of a tube attached to a set of mirrors. There are 2 mirrors in a periscope. The light from the object falls on one mirror that is placed at $45^\circ$ to the object and the light gets reflected. This reflected light in turn falls on another mirror and is again reflected until it reaches the eyepiece.

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