Kelvi

A point object is placed at a distance of $60$ cm from a convex lens of focal length $30$ cm. If a plane mirror were put perpendicular to the principal axis of the lens and at a distance of $40$ cm from it, the final image would be formed at a distance of:

medium

Ray Optics and Optical Instruments

2021

physics

$20$ cm from the lens, it would be a real image.

$30$ cm from the lens, it would be a real image.

$30$ cm from the plane mirror, it would be a virtual image.

$20$ cm from the plane mirror, it would be a virtual image.

Explanation

To solve this problem, we need to consider the lens and mirror system. $\\$ Given: $\\$ • Object distance from the lens $(u) = -60$ cm (since it is on the opposite side of the incident light). $\\$ • Focal length of the lens $(f) = 30$

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A point object is placed at a distance of 60 60 60 cm from a convex lens of focal length 30 30 30 cm. If a plane mirror were put perpendicular to the principal axis of the lens and at a distance of 40 40 40 cm from it, the final image would be formed at a distance of:

Explanation

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A point object is placed at a distance of $60$ cm from a convex lens of focal length $30$ cm. If a plane mirror were put perpendicular to the principal axis of the lens and at a distance of $40$ cm from it, the final image would be formed at a distance of: