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Physics - Geometrical Optics Question with Solution | TestHub

PhysicsGeometrical OpticsReflection at curved surfaceMedium2 minQB

PhysicsMediuminteger

The image (of a real object) formed by a concave mirror is twice the size of the object and inverted. The focal length of the mirror is 20 cm. The distance (in cm) of the object from the mirror is :

Answer:

Solution:

Inverted image twice the size gives v = 2u.

$\frac{1}{2 u} + \frac{1}{u} = - \frac{1}{20} \Rightarrow \frac{3}{2 u} = - \frac{1}{20} \Rightarrow u = - 30 cm$

Answer: 30

Stream:JEESubject:PhysicsTopic:Geometrical OpticsSubtopic:Reflection at curved surface

⏱ 2mℹ️ Source: QB

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