An empty spherical flask of diameter `15 cm` is placed in water of `mu = 4//3`. A parallel beam of light strikes the flask. Where does it get focussed, when observed from within the flask ?

An empty spherical flask of diameter 15 cm is placed in water of refractive index 4//3 .A parallel beam of light strikes the flask.Where does it get focussed,when obsrved from within the flask?

A sphere of glass (mu = 1.5) is of 20 cm diameter. A parallel beam enters it from one side. Where will it get focussed on the other side ?

A glass sphere of diameter 20 cm is constructed with a material of refractive index 1.5. A beam of light strikes the sphere and converges at a point 40 cm behind the pole of a spherical surface. Find the position of the image.

A half spherical glass lens with refractive index 1.5 is placed in a liquid with refractive index of 1.3 (see following figure). The radius of the half spherical lens is 10 cm. A parallel beam of light travelling in the liquid is refreacted by the glass lens. Then the absolute value of the position of the image from the centre of the glass lens will be

A spherical surface of radius R separates air from a medium of refractive index mu . Parallel beam of light is incident, from medium side, making a small angle theta with the principal axis of the spherical surface. Find the co-ordinates of the point where the rays will focus in air.

A converging lens of focal length 20cm is separated 8 cm from a diverging lens of focal length 30 cm. A parallel beam of light falls on converging lens and after passing through diverging lens focussed at point P. Find the location of point P. Repeat the calculation for the case when the parallel beam first falls on diverging lens. [4.2 cm from convex lens]

A convex lens of power 3 D is held in contact with a concave lens of power -1D.A parallel beam of light is made to fall on the combination. At what distance from the combination will the beam get focussed?

A spherical ball of transparent material has index of refraction mu. A narrow beam of light AB is aimed as shown. What must the index of refraction be in order that the light is focused at the point C on the opposite end of the diameter from where the light entered? Given that xgt gtR.

A spherical ball of transparent material has index of refraction mu. A narrow beam of light AB is aimed as shown. What must the index of refraction be in order that the light is focused at the point C on the opposite end of the diameter from where the light entered? Given that xgt gtR.