A small object is placed 50 cm to the left of thin convex lens of focal length 30 cm. A convex spherical mirror of radius of curvature 100 cm is placed to the right of the lens at a distance of 50 cm.

Question

A small object is placed 50 cm to the left of thin convex lens of focal length 30 cm. A convex spherical mirror of radius of curvature 100 cm is placed to the right of the lens at a distance of 50 cm. The mirror is tilted such that the axis of the mirror is at an angle $θ = 30^{o}$ to the axis of the lens, as shown in the figure. If the origin of the coordinate system is taken to be at the centre of the lens, the coordinates (in cm) of the point (x, y) at which the image is formed are:
Screenshot 2026-02-08 at 9.48.26 PM.png

TestHub · Accepted Answer

For lens V = ( - 50 ) ( 30 ) - 50 + 30 = 75 For mirror V = 25 3 2 50 25 3 2 - 50 = - 50 3 4 - 3 m = v u = h 2 h 1 ⇒ h 2 = - - 50 3 4 - 3 25 3 2 . 25 2 h 2 = + 50 4 - 3 The x coordinate of the images = 50 - v cos ⁡ 30 + h 2 cos ⁡ 60 ≈ 25 The y coordinate of the images = v sin ⁡ 30 + h 2 sin ⁡ 60 ≈ 25 3

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