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10th Class Science Light - Reflection and Refraction Question Bank Light

  • question_answer
    Light takes 8 minuts 20 seconds to reach from sun on the earth. If the whole atmosphere is filled with water, the light will take the time  \[({{\mu }_{w}}=4\text{/}3)\]

    A)  8 minutes 20 seconds

    B)  8 minutes

    C)  6 minutes 11 seconds

    D)  11 minutes 6 seconds  

    Correct Answer: D

    Solution :

     In water, velocity of light will become\[\frac{1}{\mu }\]times\[,\]\[i.e.\text{ }3/4th\] . So, time taken to cover the same distance will become \[4/3\] times.


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