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Geometrical Optics question

2022 · 25 Jul · Shift 2 · Q69
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Geometrical Optics question

2022 · 25 Jul · Shift 2 · Q69

JEE MainPhysicsGeometrical OpticsNumerical+4 / −1
A convex lens of focal length 20 cm is placed in front of a convex mirror with principal axis coinciding each other. The distance between the lens and mirror is 10 cm. A point object is placed on principal axis at a distance of 60 cm from the convex lens. The image formed by combination coincides the object itself. The focal length of the convex mirror is ‾\underline{\hspace{2cm}}​ cm.
Numerical answer
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