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Physics - Geometrical Optics Question with Solution | TestHub

PhysicsGeometrical OpticsRefraction at curved surface/LensEasy2 minPYQ_2020

PhysicsEasysingle choice

A point object is placed at a distance of 25 cm from a convex lens of local length 20 cm. If a glass slab of thickness t and reflective index 1.5 is inserted between the lens and object. The image is formed at infinity. Find the thickness t.

Options:

Answer:

Solution:

For final image at infinity image by the slab must be at the focus of convex lense shift

$= t (1 - \frac{1}{μ}) \Rightarrow 5 = t (1 - \frac{2}{3})$

t = 15 cm

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

⏱ 2mℹ️ Source: PYQ_2020

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