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Q. A prism is made of glass of unknown refractive index. A parallel beam of light is incident on a face of the prism. The angle of minimum deviation is measured to be 40°.What is t
How noisy is an illuminator? It is very noisy, slightly so or completely silent, depending upon the power source and the construction. There heat dissipation is something which
Name any two elementary particles which have almost infinite life time? Electron and proton have almost infinite life time.
Describe how the laser transitions are arisen. The given energy level diagram could describe how the laser transitions arise. Collisions in between the He atoms and Ne
FACTORS AFFECTING INDUCED EMF By experiment, the following factors may be noted: • The faster the magnet (or coil) is moved, the greater is the deflection obtained on the meter
Two grating A and B have the same width of the ruled surface but A has greater number of lines. Giving reasons compare in two cases (a) Intensity (b) Width of principal maxim
different combination of pipe material, insulation material and it size.
Conductor: Conductors are those substances which permit electric current to passes easily by them. e.g. Metal, impure, water etc.
Properties of light: The wavefronts can be of different shapes depending on the size and shape of light source and the distance from it. Huygens' principle states that every p
A see-saw lever Get a thick plank about 3 m long and bring it into the class room. Balance it over a box or some other suitable device and let the pupils experiment with the se
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