A narrow parallel beam of light is incident on a transparent sphere of refractives index`n`if the beam finally gets focussed at a point situated at a distance=`2xx("radius of sphere")` form the center of the sphere then find`n`?

A narrow parallel beam of light is incident on a transparent sphere of refractive index n if the beam finally gets focused at a point situated at a distance= 2xx("radius of sphere") form the center of the sphere then find n ?

A narrow parallel beam of light is incident on a transparent sphere of refractive index n if the beam finally gets focused at a point situated at a distance= 2xx("radius of sphere") form the center of the sphere then find n ?

A parallel beam of light falls on a solid tranparent sphere. Q. Which is corret?

A parallel beam of light falls on a solid tranparent sphere. Q. Which is corret?

A parallel beam of light falls on a solid tranparent sphere. Q. For what value of refractive index mu , the thin beam can be focussed at centre of sphere.

A narrow pencil of parallel light is incident normally on a solid transparent sphere of radius r. What should be the refractive index if the pencil is to be focussed (a) at the surface of the sphere, (b) at the centre of the sphere.

A narrow pencil of parallel light is incident normally on a solid transparent sphere of radius r. What should be the refractive index if the pencil is to be focussed (a) at the surface of the sphere, (b) at the centre of the sphere.

A narrow pencil of parallel light is incident normally on a solid transparent sphere of radius r. What should be the refractive index if the pencil is to be focussed (a) at the surface of the sphere, (b) at the centre of the sphere.