7th Class Science Light Question Bank Light

  • question_answer
    Dispersion of light by a glass prism takes place because of

    A) difference in wavelengths of the constituents of light

    B) difference in speeds of various constituents of white light.

    C) scattering of light by the surface of the glass prism

    D) only b and a are correct

    Correct Answer: D

    Solution :

    Different constituents of white light have different wavelengths. So, they travel with different speeds after refraction, though they are traveling with the same speed in air.


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