JEE Advanced | 2013Geometrical OpticsHard
Question
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 
times the wavelength in free space. The radius of the curved surface of the lens is :-
times the wavelength in free space. The radius of the curved surface of the lens is :-Options
A.1 m
B.2 m
C.3 m
D.6 m
Solution
Real image ⇒ v = + 8 m
for plano convex lens
R = 3 m
for plano convex lens
R = 3 m
Create a free account to view solution
View Solution FreeMore Geometrical Optics Questions
A plano-convex lens has focal f = 20 cm. If its plane surface is silvered, then the new focal length will be :-...A real image of a distance object is formed by a planconvex lens on its principal axis. Spherical aberration...A ray of light travelling in a transparent medium falls on a surface separating the medium from air at an angle of incid...A metallic rod of length ′l′ is tied to a string of length 2l and made to rotate with angular speed ω ...Consider the situation shown in figure. Water is filled in a beaker up to a height of 10 cm. A plane mirror is fixed at ...