Ray Optics and Optical Instruments Part 1

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

3

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

2

3

times the wavelength in air. The radius of the curved surface is ‌

x

13

m. The value of x is