Questions
A planoconvex lens of refractive index 1.5 and radius of curvature 30 cm is silvered at the curved surface. Now this lens has been used to form the image of an object. At what distance from this lens an object be placed in order to have a real image of the size of the object?
detailed solution
Correct option is B
Focal length of the system (concave mirror)F=R2μ=302×1.5=10 cmIn order to have a real image of the same size of the object, object must be placed at centre of curvature u = (2f).Similar Questions
Image of the sun is formed by a binconvex lens of focal length f. The image is a circular patch of radius r and is formed on the focal plane of the lens. Choose the correct statement from the following
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