Name: Braille System
Uploaded: 2019-07-19
Duration: 3 min 28 s
Description: What is the Braille system? This video enables students to understand the history behind the Braille system and its importance for visually challenged people.

Question

Suppose a swimming pool is filled with an imaginary liquid which is optically rarer than air. For a person looking at the pool from outside, will the apparent depth of the pool be less than or greater than the real depth? Give reasons.

Accepted Answer

The apparent depth of the pool in this case is greater than the real depth of the swimming pool as seen by the person. The refraction phenomena of light occur when light from any object passes through a medium that is rarer and denser. Drawing an imaginary line called normal can help you understand how light refracts. Due to its increased speed, light in a rarer medium bends away from the standard line. When light travels through a denser medium, it bends towards the normal line as its speed decreases. The liquid in the swimming pool is a rarer medium than the air outside in this situation. When viewed from the outside, the swimming pool appears to be deeper than it actually is. Because the light from the pool's surface bends or refracts towards the normal when it passes through a denser medium. As a result, the apparent depth will be greater, in this case.

Suppose a swimming pool is filled with an imaginary liquid which is optically rarer than air. For a person looking at the pool from outside, will the apparent depth of the pool be less than or greater than the real depth? Give reasons.

Important Questions on Refraction and Dispersion of Light

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