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Banking Physics Light - Reflection and Refraction Question Bank Optics

  • question_answer
    A star is emitting yellow light. If it is accelerated towards earth then to an observer on earth, it will appear

    A)  shinning yellow

    B)  gradually changing to violet  

    C)  gradually changing to red

    D)  unchanged

    Correct Answer: B

    Solution :

     As the star is accelerated towards earth, its apparent frequency increases, apparent wavelength decreases. Therefore, colour of light changes gradually to violet.


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