This spectrometer is most suitable for many quantitative light experiments in the colleges. Students perform experiment such as measurement of angle of a prism, refractive index of the prisms glass by minimum deviation method, dispersive power of a prism and wave length of light by diffraction grating.
Main features :
Metal casted base properly machined has three leveling screws.
Main scale dia 150mm is graduated in 360° and fixed on the same table that of telescope so that it moves with the telescope.
Double ended circular verniers reading to one minute of the arc. Both telescope and vernier have fine adjustment screws and release of the clamping screw enabling coarse adjustment to be made by hand.
Telescope has rack and pinion focusing. Achromatic objective dia 25mm and focal length 178mm is fitted in the telescope. A ramsden eye-piece 10x with cross line graticule is also provided.
Collimator is fixed on the pillar fitted on the base. It has a fine adjustable slit which is focusable by rack and pinion motion. An achromatic objective dia 25mm and focal length 178mm is also provided in the collimator.
Prism table adjustable in height has a clamping screw on its side which fixed the table to the verniers. The table moves with the vernier and is marked with lines to assist positioning of prism. It has interchangeable clamping units for prism and diffraction grating.
Spectrometer parts are stoving painted or chrome plated for long life.
The instrument is packed in polished plywood cabinet with lock and key, dust cover & cleaning cloth.