A point source S is placed in water. Name the type of beam of light it emits. This beam of light after coming out from water converges or diverges why?

Explain how a parallel beam of light on reflection from a convex mirror gets diverged.

Explain how a parallel beam of light on refraction from a convex lens gets converged.

For light diverging from a point source.

Explain how a parallel beam of light on reflection from a concave mirror gets converged.

Refractive index of water is 5//3 . A light source is placed in water at a depth of 4m. Then what must be the minimum radius of disc placed on water surface so that the light of source can be stopped?

A beam of light converges at a point P. Now a lens is placed in the path of the convergent beam 12cm from P. At what point does the beam converge if the lens is: a convex lens of focal length 20cm?

A point source of light B,placed in front of the centre of a mirror of width d,hangs vertically on a wall.A man walds in front of the mirror along a line parallel to the mirror at a distance 2L from it as shown in the figure.The gretest distance over which he can see the image of the light source in the mirror is

A beam of light converges at a point P. Now a lens is placed in the path of the convergent beam 12cm from P. At what point does thebeam converge if the lens is: a concave lens of focal length 16cm?