A large rectangular glass block of refractive index `mu` is lying on a horizontal surface as shown in Figure. Find the minimum value of `mu` so that the spot S on the surface cannot be seen through top plane ‘ABCD’ of the block.

A rectangulat block of refractive index mu is placed on a printed page lying on a horizontal surface as shown in Fig. , Find the minimum value of mu so that the letter L on the page is not visible from any of the vertical sides.

A rectangulat block of refractive index mu is placed on a printed page lying on a horizontal surface as shown in Fig. , Find the minimum value of mu so that the letter L on the page is not visible from any of the vertical sides.

A rectangulat block of refractive index mu is placed on a printed page lying on a horizontal surface as shown in Fig. , Find the minimum value of mu so that the letter L on the page is not visible from any of the vertical sides.

Initially, both the blocks are at rest on horizontal surface as shown in the figure. Find the minimum value of force F in (N) so that sliding starts between the blocks (g=10ms^(-2))

Initially, both the blocks are at rest on horizontal surface as shown in the figure. Find the minimum value of force F in (N) so that sliding starts between the blocks (g=10ms^(-2))

A cubical block of glass is placed on a printed page lying on a horizontal surface. Then, the minimum value of refractive index of glass for which the letters on the page are not visible from any of the vertical faces of the block is

A block of mass m lying on a rough horizontal surface of friction coefficient mu is pulled by a force F as shown , the limiting friction between the block and surface will be