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Hubble's law (E.P. Hubble; 1925):
A relationship discovered among distance & radial velocity. Further away a galaxy is away from is, the quicker it is receding away from us. The constant of proportionality is Hubble constant, H0. The cause is interpreted such as the expansion of spacetime itself.
What are sheathed fibers? The optics, which has an external cladding whether transparent or opaque, affords a mechanical protection to the optics.
Q. State any three uses of IR rays. (a) Infrared lamps are utilized in physiotherapy. (b) Infrared photographs are utilized in weather forecasting. (c) As infrared radia
What do you mean by normal shift? Derive the mathematical expression for normal shift produced when an object in a denser medium is viewed normally through air.
who present first three laws of motions
Ratio of masses of proton and electron is: (1) Infinite (2) 1.8x10 3 (3) 1.8 (4) None of these Ans: (2) 1.8x10 3
How will you determine the difference in the wavelengths of 2D lines of sodium light buy Michelson Interferometer
A device which changes light energy into electrical energy is known as photoelectric cell. It is also known as photocell or electric eye.
for small values of theta sine theta is equal to tan theta . how?
The charged particles whose flow in a exact direction constitutes the electric current are known as current carriers. In separate positions current carriers are dissimilar. (i)
Why is quantum mechanics important? Quantum mechanics is important to understand the behavior of systems at atomic length scales and duration smaller. For illustration, when Ne
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