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Module-II
Explain the formation of Newton’s rings. Obtain the expression for finding
the wavelength of light.
An air wedge is formed using two optically plane glass strips of length ‏ع‎
‎A spacer of thickness 0.015 mm is introduced at one end. If the light used is
of wavelength 58934, find the separation between consecutive bright fringes.
What is grating? Give the theory of plane transmission grating. How can it be
used to find the wavelength of light?
A plane transmission grating has 6000 lines/em. It is used to obtain a
spectrum of light from sodium lamp in second order. Calculate the angular
separation between two sodium lines of 0 Aand 5896 A.
Module-III
Starting from a plane wave equation,obtain Schrodinger’s time dependent
equation, by using de Broglie’s formula and Einstein’s relation for photon
energy.
Using position - momentum uncertainty relation show that electrons cannot
exist in the nucleus.
Explain the mechanical, electrical and optical properties of nanomaterials.
Mention any five applications of nanotechnology.
Module-IV
Explain the terms absorption coefficient and reverberation time. What is
thesignificance of reverberation time? Discuss the factors on which the

reverberation time depends and write the Sabine’s formula.

A hall has dimensions of 25mA20mX8m. The reverberation time is
4s.Determine the average absorption coefficient of the surfaces.

What is meant by magnetostriction effect?Give two examples for
magnetostrictive materials. Explain the production of ultrasonic waves by
magnetostriction method. Mention any two medical applications of ultrasonic
waves.

A quartz crystal of 2mm is vibrating at resonance. Calculate the fundamental
frequency of vibration, if Young’s modulus of quartz 15 7 Nim? and

density3000Kg/m*,

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