Start Free Mock LoginAlready registered? Login here

Physics - Geometrical Optics Question with Solution | TestHub

PhysicsGeometrical OpticsRefraction at curved surface/LensMedium2 minQB

PhysicsMediumsingle choice

A real object is placed 1 cm above the optical axis of a convex lens of focal length 40 cm. The object distance is 60 cm. If the object now starts moving perpendicularly away from the optical axis with a speed = 10 cm/s, the speed of the image is

Options:

Answer:

Solution:

$\frac{1}{v} - \frac{1}{- 60} = \frac{1}{40} \Rightarrow v = 120$ cm; $m = \frac{v}{u} = 2$ . Speed of image $= m \times 10 = 20$ cm/s.

Stream:JEESubject:PhysicsTopic:Geometrical OpticsSubtopic:Refraction at curved surface/Lens

⏱ 2mℹ️ Source: QB

Doubts & Discussion

Loading discussions...