Questions
The image of an object, formed by a plano-convex lens at a distance of 8 m behind the lens, is real and is one-third the size of the object. The wavelength of light inside the lens is 2/3 times and the wavelength in free space. The radius of the curved surface of the lens is
detailed solution
Correct option is C
μ=λairλmedium=12/3=32 Further, m=13=vu ∴v=u3v=+8m (Real image ) Given⇒u=−24m (Real object) Now, 1v−1u=1f=μ−11+R−1∞∴18+124=32−11R ∴R=3 mTalk to our academic expert!
Similar Questions
A plano convex lens fits exactly into a plano concave lens. Their plane surfaces are parallel to each other. If lenses are made of different materials of refractive indices and and R is the radius of curvature of the curved surface of the lenses, then the focal length of the combination is
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