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The figure shows the initial position of a point source of light s, a detector D and lens L. Now at t = 0, all three starts moving towards right with different velocity as shown in figure. The times at which detector receives the maximum light, is (Assume that the detector is initially just touching the lens).

 

Option 1 -

5s and 10s

Option 2 -

0.5s and 4.5s

Option 3 -

2s and 3s

Option 4 -

Only 10s

0 2 Views | Posted a month ago
Asked by Shiksha User

  • 1 Answer

  • A

    Answered by

    alok kumar singh | Contributor-Level 10

    a month ago
    Correct Option - 2


    Detailed Solution:

    1 0 . 9 = + 1 ( 1 0 ? 2 t ) + 1 2 t  

    t = 0.5 sec and t = 4.5 sec.

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