JEE Main 2026 Physics question
A thin biconvex lens is prepared from the glass (μ = 1.5) both curved surfaces of which have equal radii of 20 cm each. Left side surface of the lens is silvered from outside to make it reflecting. To have the position of image and object at the same place, the object should be placed, from the lens at a distance of cm.
Answer: (A)
Solution
Light enters through the right surface (R=+20). For the image to coincide with the object, the refracted ray must hit the silvered surface normally, i.e. appear
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