Physics - Geometrical Optics Question with Solution | TestHub
PhysicsGeometrical OpticsRefraction at curved surface/LensMedium2 minQB
PhysicsMediumsingle choice
. A point object is moving with velocity 10 m/s along the principal axis of a stationary lens. The lens is free to move along its axis. The mass of the object and the lens is same. There are no external forces on the system of object and the lens. If the collision is elastic then just after the collision the speed of the image relative to ground will be:
Options:
Answer:
C
Solution:
In the elastic collision of equal masses the object and the lens exchange velocities: just after the collision the object is at rest and the lens moves with 10 m/s. The image velocity, set by the instantaneous object-lens geometry through evaluated at that instant, is zero irrespective of whether the lens is converging or diverging. Hence (C).
Stream:JEESubject:PhysicsTopic:Geometrical OpticsSubtopic:Refraction at curved surface/Lens
⏱ 2mℹ️ Source: QB
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