Dept. of Physics
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ENGINEERING PHYSICS LABORATORY
We have Physics Lab for regular academic work of S1 and S2 BTech students of all branches
Newton’s Rings apparatus
This apparatus consists of a Travelling microscope, an arrangement for the formation of Newton’s Rings (plano convex lens on plane glass plate), and Sodium vapour lamp. The wavelength of light from sodium vapour lamp is measured using this apparatus. This works on the principle of Thin Film Interference. We can also find the refractive index of a liquid using this arrangement. There are two units of this apparatus.
Air wedge Apparatus
The apparatus consists of two optically plane glass plates, thin wire, Sodium vapour lamp and a Travelling microscope. A thin wire whose diameter is to be determined is kept as the spacer between the two glass plates. We can find the diameter of the thin wire using air wedge arrangement. This is an application of Thin Film Interference. Using a thin film of known thickness, we can find an unknown wavelength. There is one unit of this apparatus.
Melde’s String
An Electrically maintained tuning fork in transverse mode, a stand with clamp and pulley, a light weight pan, a weight box, analytical balance, a battery with eliminator and a long string of uniform linear density are the elements of this experimental setup. The frequency of the tuning fork can be determined using this apparatus both in transverse mode and longitudinal mode. There are two units of this apparatus. The equipment was purchased during September 2015 at a cost of Rs. 10,746.
Cathode Ray Oscilloscope (CRO)
The major elements of this experimental set up are a CRO and a function Generator. A CRO consists of a Cathode Ray Tube (CRT) and associated control and input circuitry and power supplies. It is used to study the electronic waveforms visually. Waves of different shapes and sizes can be generated and their properties can be studied using CRO. There is one unit of this apparatus
Spectrometer
The aim of the experiment is to find the dispersive power of a diffraction grating. The experimental arrangement consists of a spectrometer, mercury vapor lamp as white light source and a diffraction grating.
Solar Cell
The aim of this lab exercise is to experimentally create the Current vs. Voltage for an actual solar cell under various illumination conditions. 17 V (Nominal) Thin Film Amorphous Silicon Solar Module, 100 W Halogen lamps, small electronic circuits to control load voltage of solar panel etc.,
Fraunhofer Diffraction
The experimental arrangement consists of an optical bench with fixtures and screen, Laser source, adjustable slit etc. we can find the slit width using this arrangement. This can also be used to determine an unknown wavelength if the slit width is given. This can also be used for finding the wavelength of laser with diffraction grating. Theory of diffraction is used for this experiment.
Fibre Optics
Experimental set up consist of optical fibre, laser diode, objective, detector, multimeter etc.,