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ICSE Class 10 Physics Question 15 of 27

Solved Sample Paper 5 — Question 3

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3
Question

Question 4(iii)

(a) With the help of a suitable diagram, represent the refraction of light rays from

I. rarer to denser medium

II. denser to rarer medium.

(b) Does the depth of a tank of water appear to change or remains the same when viewed normally from the above?

Answer

(a)

I. The below ray diagram shows the refraction of light from rarer (air) to denser (glass) medium:

Draw diagram to show the refraction of light from air to glass. Label incident ray, refracted ray, angle of incidence, angle of refraction. Refraction of light at plane surfaces, Concise Physics Class 10 Solutions.

II. The below ray diagram shows the refraction of light from denser (glass) to rarer (air) medium:

Draw diagram to show the refraction of light from air to glass. Label incident ray, refracted ray, angle of incidence, angle of refraction. Refraction of light at plane surfaces, Concise Physics Class 10 Solutions.

(b) When a tank is viewed normally from above, the apparent depth of the tank will remain the same as the incident light striking normally on the surface will pass undeviated. Hence, no phenomenon of refraction is observed and depth of pond appears same.