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Olbers' paradox (H. Olbers; 1826):
If the Universe is uniform, infinite & unchanging then the whole sky at night would be bright regarding as bright as the Sun. The further you looked out to space, the more stars there would be, and therefore in any direction wherein you looked your line-of-sight would impinge upon a star eventually. The paradox is resolved through the big bang theory, which puts forth that the Universe is dynamic, non-uniform and (probably) finite.
pseudo force: A "force" that arises since an observer is naively treating an accelerating frame like an inertial one.
1. A screw gauge consists of U- shaped metallic frame F. To one end of this frame, a flat shaft is fixed. On the opposite end of a hollow long cylinder C is fixed. 2. The hollow c
brewsters law
Radiation Hazards: 1. They can injure our body cells. 2. Excessive radiation might be cause cancer. 3. Energetic radiation penetrates inside the body and can cause other
Explain pure spectrum of white light
Suppose that the x rays are emitted from a focal spot isotropically. The photon flux is 3.28 x 10 6 photons mm -2 sec -1 at a distance of 0.75 m from the focal spot. What is the
what will happen if gravity becomes zero?is it possible in earth?
Q. Write the applications of a capacitor. Applications of capacitors. (i) They are utilized in the ignition system of automobile engines to eliminate sparking. (ii) They a
An atom is said to be polarized if it possesses and effective dipole moment, that is, if there is a separation between the centres of negative and positive charge distribution. It
1) Clean coal technology describes new electricity generation processes that are expected to have high efficiencies, be able to minimise environmental impacts, including SO 2 , NOx
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