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Physics - Geometrical Optics Question with Solution | TestHub

PhysicsGeometrical OpticsRefraction at curved surface/LensMedium2 minPYQ_2021

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An object is located on a wall, its image of equal size is to be obtained on a parallel wall with the help of a convex lens. The lens in placed at a distance ' $d$ ' in front of the second wall. The required focal length of the lens is

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Solution:

Size of the image is equal to the size of the object. Hence image distance will be equal to object distance. Also if object distance $u$ $= 2 f$ , Image distance will be $2 f$ . $∴ u = v = d = 2 f ∴ u + v = 2 d = 4 f ∴ f = \frac{d}{2}$

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

⏱ 2mℹ️ Source: PYQ_2021

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