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Q. Evaluate Diameters of Bright and Dark Newtons Rings?
Let ‘R' is the radius of curvature of a Plano-convex lens resting at a glass plate PQ. If t be the thickness of air film at a point B, a nth order ring of radius AB = rn is formed there. Since the thickness of air film at point of contact of Plano-convex lens and glass plate is zero (t=0), then from equation (ix) rn = o i.e. the radius of ring is zero, implies a point, (a point has zero radius). That's the reason Newton's ring have a dark centre.
The centre may be bright if some dust particles are there and plane glass plate and Plano convex lens are not in contract then t ≠ 0.
is it the current or the voltage which is responsible for electrc shock?
Q. Explain density? Answer:- Density is a physical characteristic also is a measure of mass per unit of volume of a material or substance. It is a dimension of the amount
A trick with surface tension Get a used tin can and make five holes in it with a nail. The holes should be very close to the bottom of the can and about five millimetres apart.
A baseball bat strikes a ball with a force of 30 newtons. If the ball was in contact with the bat for 1/10 of a second, What impulse did the ball receive? Ans - 3 Newt
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At what velocity a clock should move so that it seems slow by one minute in a day.
A ROCKETSHIP IN FREE SPACE MOVES WITH CONSTANT ACCELERATION OF 9.8 METER PER SECOND SQUARE. IF IT STARTS FROM REST HOW LONG IT WILL TAKE TO ACQUIRE A SPEED ONE-TENTH THAT OF LIGHT
#question.introduction .
Magic Carpet (Moscow Phys-Tech) Once sitting in heavy traffic the Baron von Münchausen thinking of a new kind of "magic carpet" type aircraft. The top surface of the large flat
terrestrial telescope
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