Optical square is a marvelous device that can help you measure angles and set out right angles with ease. It is used in surveying, which is the art of measuring and mapping the land. But how does optical square work and what can you do with it? In this article, we will uncover the secrets of an optical square in an easy way. You will learn how to ace any question related to optical square with flair and precision. And don’t forget to take a Free Mock Test to test your knowledge and skills on this topic.
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An optical square is a tool utilized for establishing right angles. It comprises a compact circular metal box measuring 5 cm in diameter and 1.25 cm in depth, with a movable metal cover to shield the slits.
The working principle of the optical square is based on the concept of reflecting surfaces, where the angle formed between the incident ray and the last reflected ray is twice the angle between the mirrors. In this particular optical square, the angle between the mirrors is a fixed 45 degrees, resulting in a 90-degree angle between the horizon sight and the index sight.
Q. The construction of an optical square is based on the principle of
(a) Reflection
(b) Refraction
(c) Double refraction
(d) Double reflection
ANS: (d)
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