What are the salient features of corpuscular theory of light?

What are the important points of wave theory of light?

What is the significance of electromagnetic wave theory of light?

Write a short note on quantum theory of light.

Define wavefront.

State Huygens’ principle.

What is interference of light?

What is phase of a wave?

What are coherent sources?

How does wavefront division provide coherent sources?

How do source and images behave as coherent sources?

What is bandwidth of interference pattern?

What is diffraction?

Discuss the special cases on first minimum in Fraunhofer diffraction.

What is call 'grating element'?

What is polarisation?

What is angle of polarisation and obtain the equation for angle of polarisation.

Discuss about pile of plates.

What is double refraction?

Mention the types of optically active crystals with example.

Discuss about Nicol prism.

How is polarisation of light obtained by scattering of light?

What are near point and normal focusing?

Why is oil immersed objective preferred in a microscope?

What is the use of an erecting lens in a terrestrial telescope?

What are the uses of spectrometer?

What is myopia? What is its remedy?

What is hypermetropia? What is its remedy?

What is presbyopia?

What is astigmatism? What is its remedy?

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?

The wavelength of light from sodium source in vacuum is 5893Å. What are its
(a) wavelength,
(b) speed and
(c) frequency when this light travels in water which has a refractive index of 1.33.

Two light sources of equal amplitudes interfere with each other. Calculate the ratio of maximum and minimum intensities.

Two light sources have intensity of light as I₀. What is the resultant intensity at a point where the two light waves have a phase difference of π/3?

The wavelength of a light is 450 nm. How much phase it will differ for a path of 3 mm?

Calculate the distance upto which ray optics is a good approximation for light of wavelength 500 nm falls on an aperture of width 0.5 mm.

A diffraction grating consists of 4000 slits per centimeter. It is illuminated by a monochromatic light. The second order diffraction maximum is produced at an angle of 30°. What is the wavelength of the light used?

A monochromatic light of wavelength of 500 nm strikes a grating and produces fourth order maximum at an angle of 30°. Find the number of slits per centimeter.

The optical telescope in the Vainu Bappu Observatory at Kavalur has an objective lens of diameter 2.3 m. What is its angular resolution if the wavelength of light used is 589 nm?

Two polaroids are kept with their transmission axes inclined at 30^o. Unpolarised light of intensity I falls on the first polaroid. Find out the intensity of light emerging from the second polaroid.

Two polaroids are kept crossed (transmission axes at 90^o ) to each other.
(a) What will be the intensity of the light coming out from the second polaroid when an unpolarised light of intensity I falls on the first polaroid?
(b) What will be the intensity of light coming out from the second polaroid if a third polaroid is kept in between at 45^o inclination to both of them.

Find the polarizing angles for
(i) glass of refractive index 1.5 and
(ii) water of refractive index 1.33.

What is the angle at which a glass plate of refractive index 1.65 is to be kept with respect to the horizontal surface so that an unpolarised light travelling horizontal after reflection from the glass plate is found to be plane polarised?

A microscope has an objective and eyepiece of focal lengths 5 cm and 50 cm respectively with tube length 30 cm. Find the magnification of the microscope in the
(a) near point and
(b) normal focusing.

Calculate the power of the lens of the spectacles needed to rectify the defect of nearsightedness for a person who could see clearly up to a distance of 1.8 m.

A person has farsightedness with the far distance he could see clearly is 75 cm. Calculate the power of the lens of the spectacles needed to rectify the defect.

What is intensity (or) amplitude division?

What is Rayleigh’s criterion?

What is the use of collimator in a spectrometer?