a)� Nodal Upright: Consists of a combinaon of Single & double lens holder on amount rotang along the vercal axis. The combinaon lens holders are adjustable in height, and the single & twin lens holders can either be moved together by rack & pinion or relave to each other by sliding. These moons can be read by individual pointers on a mm scale.
b)� Mirror: Plain, inclinable with 3â?? steel C.P. Stem
c) Optical Slit: With fine machined cross slit, one surface white & the other opcal black, with 3â?? steel C.P. Stem
d) Lamp House: an electric bulb is encased in a metal case with cord & pin. It works on 220VAC.
The bench has two steel rods, one of which is graduated in mm with heavy metal end supports with leveling screws with four metal slides that slide smoothly on the bench. Two of the slides have a transverse motion arrangement. Complete with two lens holders and two object needles.
Kit develops the creative mind of student and clear the theoretical concept related to the light, creation of rainbow from sunlight, straight line propagation, transparent and opaque materials, reflection and refraction, images formed by lens, colours and the spectrum. Kit consists of three wooden V shape lens holder, a white screen, two plane mirrors, a glass sheet, a plastic beaker, two prism, two lens/mirror supports, a flashlight, a candle, five set of color filter two convex lens, a concave lens and a plano convex lens
On a wooden base, with a 1.5 meter scale, with six sliding bases. Each sliding the base is with an index mark, a brass pillar, and a locking screw, with following accessories:
One lamp house with a 230 V lamp.
One object screen, metal, white.
One lens holder for 38 mm diam. Lenses.
One receiving screen, metal, white, with a slot for a squared paper on reverse.
One object needle mounted in brass rod.
One plane mirror in a metal frame.
Each of these accessories is mounted on a 6 mm brass rod which fits into the pillars and is adjustable for height.
