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

  • question_answer
    When a light wave goes from air into water,  the quality that remains unchanged is its [AMU 1995; MNR 1985, 95; KCET 1993; CPMT 1990, 97; MP PET 1991, 2000, 02; UPSEAT 1999, 2000; AFMC 1993, 98, 2003; RPET 1996, 2000, 03; RPMT 1999, 2000; DCE 2001; BHU 2001]

    A)            Speed                                     

    B)            Amplitude

    C)            Frequency                            

    D)            Wavelength

    Correct Answer: C

    Solution :

                       Let \[{\nu }'\]and \[{\lambda }'\]represents frequency and wavelength of light in medium respectively.            so \[{\nu }'=\frac{v}{{{\lambda }'}}=\frac{c/\mu }{\lambda /\mu }=\frac{c}{\lambda }=\nu \]


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