Grade 12Wave Optics
if the curved surface of plano convex lens is silvered then wat is the formula to find its focal length ?
if the curved surface of plano convex lens is silvered then wat is the formula to find its focal length ?
1 Answer
Abhishek Kumar
Since plane surface is silvered, it acts as a mirror of focal length equal to the focal length of the curved surface.
So, 1/fc = 1/flens + 1/fmirror + 1/flens (Ray has first refraction, then reflection then again refraction brfore emerging out)
So, 1/fc = 1/flens + 1/fmirror + 1/flens (Ray has first refraction, then reflection then again refraction brfore emerging out)
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