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It is based on the principle that conductivity of a semiconductor enhances with increase in the intensity of incident light.
In this, a thin layer of some semiconductor (as selenium) is placed below a transparent foil of some metal. This combination is fixed over an iron plate. When wave is incident on the transparent foil, the electrical resistance of the semiconductor layer is changed. As a light starts flowing in the battery circuit linked.
how does a magnifying glass work to produce a large or smaller image?
i need to think of a project to assemble as soon as possible but i need some ideas.. what projects can i present??
Medicines: 1. Iodine 131 is used for the study of thyroid glands. 2. Radiation in low dosage can also be used for sterilizing bandages. 3. Radio-Cobalt-60 has been widely
Cadmium rods are provided in a nuclear reactor. Why? Cadmium rods are given in nuclear reactors due to when we begin nuclear reactor then more energy is required for start the
how to calculate speed of light? The speed of light in vacuum, normally denoted by symbol c, is a universal physical constant which is very important in various areas of physi
Explain about the Homojunction Laser in brief. Homojunction Laser: Assume that GaAs be doped with T providing n-type material and with Ge providing p-type material. In forwa
COHERENCE : 1) Visible light energy is emitted when the excited electrons in atoms undergo transitions to the ground state. 2) In ordinary light sources, these transitions
A skydiver falls d1 = 495 meters in t1 = 22 s before opening his parachute. After the chute opens, he falls an additional d2 = 470 meters in t2 = 56.5 s. (a) Write an expression t
at what velocity a clock should move so that it seems slow by one minute in a day?
to find neuteral point of earth
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