Consists of the following blocks. Each has a thickness of 25mm and size 70mm. In a wooden case.

Bi- Concave

Bi-Convex

Rectangular

Semi-circular

Triangle Equilateral

Triangle Right angle ( 90°-45°-45°)

Triangle Right angle ( 90°-60°-30°)

For quantitative examination of spectral composition of white light, radiant bodies etc.

Comprises a metal draw-out tube of 20mm diameter, with an adjustable slit at one end. The light passing through this slit falls on the prism elements and break up into a spectrum. This can be viewed through an eye piece at the other end of the tube. Fully drawn-out length is 130mm. Supplied in a wooden box.

Specially designed power supply to safely run spectrum discharge tubes of length approximately 26cm. Encased in a metal body. Spring loaded with clips to connect the tubes securely.

Similar to 3380-00 but with enhanced features for obtaining better quantitative results. Consists of a heavy cast base and a pillar for collimator support. The telescope arm moves along a fixed circular plate 150mm diameter graduated in degrees. This plate has a double ended vernier for better and accurate measurements, with a least count of 30". Fine adjustment is accomplished by using a knob while the coarse adjustment can be done by hand. Both the collimator and the telescope are mounted with an axis adjustment system. The telescope has a 10X Ramsden eyepiece and is fitted with a cross hair reticle. Both the telescope and the collimator are fitted with coated achromatic objectives of 178mm focal length and 32mm diameter, providing light for a brighter and sharper image. The focussing is done by a concealed rack and pinion. The collimator slit 6mm long, is specially designed for retention of initial accuracy during the life of the instrument. The prism table 75mm diameter is held with the help of a clamping screw enabling the table to be rotated in any direction. It has lines and concentric rings marked to assist positioning of prism in relation to levelling screws. It is fitted with a diffraction grating holder of aperture 25mm x 25mm and a clamp for holding prisms upto 38mm high.

Provided with a magnifying eye glass to read the vernier, tommy bar for axis adjustment and flannel cloth. Supplied in a wooden box.