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What do you mean by total internal reflection? State the conditions to be fulfilled for total internal reflection. Desfine the construction and working of an optical fibre. Sate its uses.
how to reduce friction?
A boy is standing on an elevator which is travelling downward with constant velocity of 30 meters per second. The boy throws a ball vertically upward with velocity of 10 meter
practical applications of vectors in everyday life
A floater to show surface tension Bend a piece of small copper wire into a ring about 8 cm in diameter. Attach two other pieces of wire rigidly to conflicting sides of the ring
what is magnitisam?how north pole and south pole takes part in it?
A bar has a 20N weight at one end. You have a weight of 15N to hang somewhere on the bar so that the bar is in equilibrium. Where would you hang the 15 N weight on each of these ba
Cosmological redshift An effect where light emitted through a distant source seems redshifted due to the expansion of spacetime itself.
How can you differentiate between circularly polarised light and unpolarized light?
Work out the voltage for the following arrangement of 1.5V cells: ( Solve problems with cells in series, parallel and series-parallel)
Is the sheath color important? This is a mainly slippery subject and the cause of heated debate. Several scientists affirm that an opaque light or white colored cladding, parti
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