Geometrical OpticsHard
Question
A plano-convex lens has focal f = 20 cm. If its plane surface is silvered, then the new focal length will be :-
Options
A.10 cm
B.15 cm
C.20 cm
D.25 cm
Solution
A plano-convex lens with its silvered plane surface behaves like a concave mirror of focal length
or F = 10 cm
or F = 10 cm
Create a free account to view solution
View Solution FreeMore Geometrical Optics Questions
A fish looking up through the water can see the whole outside world contained in a circular horizon. If the refractive i...In a double slit experiment instead of talking slits of equal widths, one slits is made twice as wide as the other, then...A thin convex lens of focal length ′f′ is put on a plane mirror as shown in the figure. When an object is ke...To remove myopia (short sightedness) a lens of power 0.66D is required. The distant point of the eye is approximately...A thin prism P1 with angle 6o and made from glass of refractive index 1.54 is combined with another thin prism P2 of ref...