JEE Main & Advanced Physics Ray Optics Question Bank Refraction of Light at Plane Surfaces

  • question_answer
    Ray optics is valid, when characteristic  dimensions are [CBSE PMT 1994; CPMT 2001]

    A)            Of the same order as the wavelength of light

    B)            Much smaller than the wavelength of light

    C)            Of the order of one millimetre

    D)            Much larger than the wavelength of light

    Correct Answer: D

    Solution :

               Ray optics is valid when size of the objects is much larger than the order of wavelength of light.


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