Description

This is a compact, light weight and economically priced model capable of performing following spectra and optical experiments:

• Determining resolving power of the prism.
• Determining dispersion power of the prism.
• Determining the refractive index of the material of prism.
• Determining resolving power of a plane diffraction grating.
• Determining wavelength of sodium light using a plane diffraction grating.

Specification:

Base:  Heavy aluminium cast base with an integral fixed pillar for the collimator support and a swinging telescopic arm. Both the collimator and the telescope are provided with an axis adjustment system.

Scale: The scale of diameter 170mm is machined engraved and graduated 0-360° x 1º. A vernier is provided that reads to 0.1º or 6 seconds and permits estimation to 0.05°. Fine adjustment is provided.

Collimator: The collimator tube fitted with achromatic objective lens with clear aperture of 22mm and focal length 175mm. It has spiral focusing system.  It contains an adjustable slit of 6mm long. Collimator tube mounted on fixed pillar.

Telescope: The Telescope tube fitted with achromatic objective lens with clear aperture of 22mm and focal length 175mm. It has spiral focusing system. It is mounted on a movable arm with slow and fine motion.

Ramsden Eyepiece: It has an 8x Ramsden eyepiece with cross line glass graticule and In and Out focus adjustment.

Prism Table: The prism table is provided with three levelling screws and is marked with lines to assist placement of prism.

Standard Accessories supplied: It contains 1 prism clamp for prisms of 38mm height, 1 diffraction grating holder and 1 tommy bar for axis adjustment.