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SSC Sample Paper SSC (Group-C) Sample Test Paper-2

  • question_answer
    During acute summer, when the temperature is very high, the patches of water are seen on the highways from a distance. But when the observer reaches close, the patches disappear and appear at a farther distance. This illusion is due to:

    A)  Total external reflection of light

    B)  Total internal reflection of light  

    C)  Partial external reflection of light

    D)  Partial internal reflection of light

    Correct Answer: B

    Solution :

     This illusion is known as mirage effect which happens due to total internal reflection of light at layers of air of different densities. In summer, due to intense heating of the earth, refractive index of the air near the surface of earth becomes lesser than above it.


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