JEE Main & Advanced Sample Paper JEE Main - Mock Test - 21

  • question_answer
    An observer is standing at a point 0, at a distance of 100 cm from a convex lens of focal length\[50\text{ }cm\]. A plane mirror is placed behind the lens at a distance of \[150\text{ }cm\]from the lens. The mirror now starts moving towards the right with a velocity of\[10\text{ }cm/s\]. What will be the magnitude of velocity (in cm/s) other own image as seen by the observer, at the moment when the mirror just starts moving?



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