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Solution


Q.

Read the passage given below and answer the following questions from (i) to (v).

Atmospheric refraction is the phenomenon of bending of light on passing through the earth’s atmosphere. As we move above the surface of the earth, the density of air goes on decreasing. Local conditions like temperature etc. also affect the optical density of the earth’s atmosphere. On account of atmospheric refraction, stars seem to appear higher than they actually are. Advanced sunrise, delayed sunset, the oval appearance of the sun at sunrise and sunset, twinkling of stars, all can be explained with atmospheric refraction.

 

(iii) The sun appears oval-shaped or flattened due to:
1 Dispersion  
2 Scattering  
3 Atmospheric refraction  
4 Atmospheric reflection  

Ans.

(3)