SPECTROMETER STUDENT

Spectrometer with dia 170 mm, metallic scale graduated 360° x 1° independently rotatable, with locking screw, vernier attached to the telescope reads to 0 to 1° (6 minutes of arc).Collimator is mounted on a fixed pillar, with an achromatic objective of 150 mm focal length and 21 mm aperture, and has an adjustable slit 6 mm long. The telescope is on a movable pillar, with a fine adjustment screw, an achromatic object of 170 mm focal length, 21 mm aperture. Ramsden eye-piece and glass crosswire graticule. Both collimator and telescope have spiral focussing system and have axis adjusting arrangement. The table has three levelling screws, with lines marked to assist prism placement. With prism holder and grating holder, one small screw driver and one tommy bar for axis adjustment. Without prism.