The image of an object placed in air formed by a convex refracting surface is at a distance of 10m behind the surface. The image is real and is at 2^ rd3 of the distance of the object from the surfac…

Question

The image of an object placed in air formed by a convex refracting surface is at a distance of

10 m

behind the
surface. The image is real and is at

\frac{2 ^{rd}}{3}

of the distance of the object from the surface .The wavelength of light
inside thesurface is

\frac{2}{3}

times the wavelength in air. Theradius of the curved surface is

\frac{x}{13} m

. the value of

’ x^{’}

is

Accepted Answer

Correct answer: 30. 30 JEE Main 2021 _m= _a ⇒ = 32 v- 1u= -1R 32 10+ 115= 52-1R R= 3013 =30

Solution