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Q. What is a frame of reference?
A system of co-ordinate axes which describe the position of a particle in two or three dimensional space is called a frame of reference.
As CPH has mass, how massless photon is made of two or more CPH? Answer; The Photon carries energy and energy has mass. But the rest mass of photon is aero. No one can see phot
If a meteorite hit the Earth and moved it 2.41x 10 10 m closer to Venus, How many days would there be in an Earth year?
In the circuit shown in Figure, with the switch in position 1, the capacitor is uncharged. If he switch is moved to position 2 at time t =0s, measure (i) The initial curren
Light coupling: Another way to look at light guiding in a fibre is to measure the fibre's acceptance angle. This angle is the angle within which the light should enter the fib
Two moles of an ideal gas expands reversibly and isothermally to ten times its volume at 25°C. Evaluate the change in entropy during the process. ( R = 8.314 JK -1 mol -1 )
(i) It is also known as impure semiconductor. (ii) The phenomena of adding impurity is known as Doping.
Total Internal Reflection: When a ray of light passes from denser medium to rare medium and angle of incidence is greater than the critical angle. The incident ray reflects ba
What is the Law of Machines? Machines which are used to lift a heavy load are governed by the "Law of machines", which says that the effort to be applied on the machine (p) is
Consider a horizontal cylinder with diameter D and length L. The center of the cylinder is a distance a above the ground. A wall with length W and height H is located to the side o
how do higher energy levels in our xray beam affect the photoelectric effect
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