A plane glass is placed over a various coloured letters (violet, green, yellow, red) The letter which appears to be raised more is _____.

In a Young’s double-slit experiment, the slit separation is doubled. To maintain the same fringe spacing on the screen, the screen-to-slit distance D must be changed to, _____.

Two coherent monochromatic light beams of intensities I and 4I are superposed. The maximum and minimum possible intensities in the resulting beam are _____.

When light is incident on a soap film of thickness 5 x 10^–5 cm, the wavelength of light reflected maximum in the visible region is 5320 Å. Refractive index of the film will be, _____.

First diffraction minimum due to a single slit of width 1.0 x 10^–5 cm is at 30^o. Then wavelength of light used is,_____.

A ray of light strikes a glass plate at an angle 60^o. If the reflected and refracted rays are perpendicular to each other, the refractive index of the glass is, _____.

One of the of Young’s double slits is covered with a glass plate as shown in figure. The position of central maximum will,_____.

Light transmitted by Nicol prism is, _____.

The transverse nature of light is shown in,

A rear mirror of a vehicle is cylindrical having a radius of curvature of 10 cm. The length of the arc of the curved surface is also 10 cm. If the eye of the driver is assumed to be at a large distance, from the mirror, then the field of view in radian is ____________.

What are the salient features of corpuscular theory of light?

Write a short note on quantum theory of light.

State Huygens’ principle.

What are coherent sources?

Differentiate between Fresnel and Fraunhofer diffraction.

What is call 'grating element'?

Differentiate between polarised and unpolarised light.

What are polariser and analyser?

State and obtain Malus’ law. (or) State Malus' Law.

What is astigmatism? What is its remedy?

Prove law of reflection using Huygens’ principle.

Discuss the interference in thin films and obtain the equations for constructive and destructive interference for transmitted and reflected light.

Discuss the diffraction at a grating and obtain the condition for the m^th maximum.

Discuss the experiment to determine the wavelength of different colours using diffraction grating.

Obtain the equation for resolving power of optical instruments.

Discuss about astronomical telescope.

Obtain the equation for bandwidth in Young’s double slit experiment.

What are the conditions for obtaining clear and broad interference bands?

What are Airy's discs?

Write the drawbacks of Nicol prism.

A beam of light of wavelength 600 nm from a distant source falls on a single slit 1 mm wide and the resulting diffraction pattern is observed on a screen 2 m away. What is the distance between the first dark fringes on either side of the central bright fringe?

You are given two converging lenses of focal lengths 1.25 cm and 5 cm to design a compound microscope. If it is desired to have a magnification of 30, find out the separation between the objective and the eyepiece.

A Parallel beam of light of 500 nm falls on a narrow slit and be resulting diffraction pattern is observed on a screen 1m away. It is observed that the first minimum is at a distance of 2.5 mm from the centre of the screen. Calculate the width of the slit.

Light of wavelength 600 nm that falls on a pair of slits producing interference pattern on a screen in which the bright fringes are separated by 7.2 mm. What must be the wavelength of another light which produces bright fringes separated by 8.1 mm with the same apparatus?

In double-slit experiment, SS₂ is greater than SSI by 0.25 A. Calculate the path difference between two interfering beams from S₁ and S₂ for minima and maxima on the screen.

Two polaroids are set in crossed positions. A third polaroid is placed between the two making an angle e with the pass axis of the first polaroid. Write the expression for the intensity of light transmitted from the second polaroid. In what orientations will the transmitted intensity be
(i) minimum and
(ii) maximum.

If a particle is thrown horizontally at a speed of 3 x 10⁸ms^-1, deduce the verticalfall in traveling 1 km distance. Given: g = 10 ms^-2, Does that result depend upon the mass of the particle? Comment on your result, considering that Newton thought light is made up of corpuscles that at a very large speed by the source 

Prove the laws of reflection using Huygen's principle.