RAJASTHAN PMT Rajasthan - PMT Solved Paper-1999

  • question_answer
    If distance between light source and screen is doubled, then intensity of light will become:

    A)  half                      

    B)         double

    C)  remain unchanged        

    D)  \[1/4\,th\]

    Correct Answer: D

    Solution :

    Intensity \[\propto \frac{1}{{{r}^{2}}}\] If distance is made double, then intensity becomes \[\frac{1}{4}th.\]


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