JEE Main 9 April 2017 Paper Solved Paper

Section: Physics

Question : 22 of 90

Marks: +1, -0

In an experiment a convex lens of focal length 15 cm is placed coaxially on an optical bench in front of a convex mirror at a distance of 5 cm from it. It is found that an object and its image coincide, if the object is placed at a distance of 20 cm from the lens. The focal length of the convex mirror is :

[Main 9 April 2017]

27.5 cm
20.0 cm
25.0 cm
30.5 cm

Validate

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