|
Pair of glass plate, optically polished, 60mm diameter one plane the other plano-convex mounted together in metal frame. Pressure between plates adjustable by three brass nickel plated screws. |
Category: Physics Instruments
OESTED APPARATUS – GUPTA BRAND 8006217
| To show the action of electric current on a magnet. Cobalt steel needle 75 mm, long with agate bearing supported by pivot mounted on plastic base and surrounded by a rectangular of copper rod 85 x 45mm, fitted with terminals. |
OPTICAL BENCH DOUBLE ROD – GUPTA BRAND 8006157
|
Bench has two steel rods, one of which is graduated in mms. with heavy metal end supports with levelling screws with four metal slides which slide smoothly on the bench.Two of the slides have transverse motion arrangement. Complete with two lens holders and two object needles. |
OPTICAL BENCH SINGLE ROD – GUPTA BRAND 8006156
|
One metre long, single square steel rod accurately graduated fitted on two sturdy metal feet with levelliing screws. Four special designed heavy sliders having fine index marks. Two of the sliders are having fine transverse slow motion arrangement. Complete with four accessories(two lens holders and two optical pins). |
OPTICAL BENCH WOODEN – GUPTA BRAND 8006158
|
||||||
OPTICAL DISC – GUPTA BRAND 8006159
A 500 mm diam. disc marked every 5° is mounted on a heavy stand and is rotatable around its centre. It can be held in any desired position. The lamphouse, with a 12V 24 W special filament lamp has rotatable slots to provide light beams of varying widths & also narrow single, double & triple beams. Attached to the lamp house is an adjustable lens carrier with lens to provide diverging, parallel or converging light beams which are clearly visible in classroom. The lamphouse can be held in any desired position around the disc.
Optical elements are two 50 x 25 mm plane glass mirrors, and a metallic cylindrical mirror, each mounted in a holder, for reflection. For refraction, 20 mm thick acrylic semi-circular block, bi-convex lens, bi-concave lens each 140 mm long & a trapezium with 125 mm base are provided. Each of these elements has embedded magnets to hold on to the disc