supply and installation of various lab equipments part three for physics and photonics science department of nit hamirpur , supply and installation of various lab equipments ( part-3 ) for physics & photonics science department of nit , hamirpur . , experimental set up to demonstrate dia-para-ferro magnetism in magnetic field , experimental set up to perform frank-hertz experiment . specifications , experimental set up to hysteresis of an iron core , experimental set up to determine the wavelength of balmer series in the visible region of hydrogen emission spectrum . , experimental set up to investigate elastic and plastic extension of metal wires , experimental set up to observe the spectrum of any light source ( glowing lamp , candle etc . ) , experimental set up to observe balmer series of hydrogen using bunsen-kirchhoff spectroscope . , experimental set up to measure the value of rydberg constant . , experimental set up measurement of the wavelength separation of sodium d-lines using a diffraction grating and to calculate the angular dispersive power of the grating . , experimental set up to measure the spatial distribution of magnetic field between a pair of identical coils in helmholz arrangement .