Consider sunlight incident on a slit of width \({ 10 }^{ 4 }\)A. The image seen through the slit shall darkness as observed through the polaroid

For light diverging from a point source

The ratio of the speed of an object to the speed of its real image of magnification m in the case of a convex mirror is

The relation between focal length \(f\) and radius of curvature \(R\) of a spherical mirror is

The correct mirror equation is

What is yellow spot?

What is the meant by accommodation of the eye?

What is range of vision?

What is the least distance of distinct vision for a normal eye? Is it the same as the distance of near point?

For double refracting crystal the refractive indices , for the ordinary and extraordinary denoted by µo and µe. What is the relation valid along the optical axis of the crystal.

What is the colour of the interference fringe nearest to the white central maximum incase of white light?

What happens to the fringe pattern when YDS experiment is performed in water instead of air?

Where does a myopic eye focus the parallel rays falling on it?

Give one possible cause of hypermetropia.

What is the difference between hypermetropia and presbyopia?

A microscope is focused on a dot at the bottom of a beaker. Some oil is poured into the beaker to a height of y cm and it is found necessary to raise the microscope through a vertical distance of x cm to bring the dot again into focus. Express refractive index of oil in terms of x and y

A ray of light passes through an equilateral glass prism, such that the angle of incidence is equal to the angle of emergence. If the angle of emergence is ¾ times the angle of the prism, Calculate the refractive index of the glass prism

A double convex lens made of glass of refractive index 1.5 has both radii of curvature of magnitude 20 cm. An object 2 cm high is placed at 10 cm from the lems. Find the position, nature and size of the image.

A beam of white light on passing through a hollow prism gives no spectrum. Why?

(a) A point object is placed in front of a double convex lens (of refractive index n =n₂/n₁ with respect air) with its spherical faces of radii of curvature R₁ and R_2.. Show the path of rays due to surface to obtain the formation of the real image of the object.
Hence obtain the lens maker's formula for a thin lens.
(b) A double convex lens having both faces of the same radius of curvature has refractive index 1.55. Find out the radius of curvature of the lens required to get the focal length of 20 cm.

Distinguish between interference and diffraction.

Light of wavelength \(5000\overset { \circ }{ A } \) falls on a plane reflecting surface. What are the wavelength and frequency of reflected light? For what angle of incidence is the reflected ray normal to the incident ray?