One face of an equiconvex lens is silvered The radius of curvature is 40 cm and refractive index of - Physics - Ray Optics and Optical Instruments

Question

One face of an equiconvex lens is silvered The radius of curvature
is 40 cm and refractive index of material of lens is 1 5 An object
is placed at 10 cm on the side of lens which is not silvered, then
the final image will form at
a) 10 cm
b) 20 cm
c) 40 cm
d) infinity

Rajnish Kumar · Accepted Answer

Dear student
1feq=2fl+1-fmirror=2(μ-1)(2R)-2R=2R{2μ-2-1}=2R{2μ-3}now using mirror formula1v=1feq-1u=12-40{2×1
5-3}-1-10=infinityRegards

One face of an equiconvex lens is silvered. The radius of curvature is 40 cm and refractive index of material of lens is 1.5 . An object is placed at 10 cm on the side of lens which is not silvered, then the final image will form at a) 10 cm b) 20 cm c) 40 cm d) infinity

One face of an equiconvex lens is silvered. The radius of curvature is 40 cm and refractive index of material of lens is 1.5 . An object is placed at 10 cm on the side of lens which is not silvered, then the final image will form at
a) 10 cm
b) 20 cm
c) 40 cm
d) infinity