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Eddington limit (Sir A. Eddington)
The theoretical limit on which the photon pressure would go above the gravitational attraction of light-emitting body. i.e., a body emitting radiation at greater than the Eddington restrictions would break up through its own photon pressure.
A child starts to build a house of cards by laying an 8.5-cm-long playing card with a mass of 0.75 g across two other playing cards: support card A and support card B. If suppor
The main constituents of glass is (A) SiO 2 (B) B 2 O 3 (C) Al 2 O 3 (D) Cr 2 O 3 Ans: The main constituents of glass are SiO 2 .
A certain spring is known to obey Hooke's Law. If a force of 10 newtons stretches the spring 2 meters, how far will a 30 newton force stretch the spring? Ans: A certain spr
A weakly guiding optical fibre propagates just two bound modes with scalar transverse electric fields ψ 1 (x,y) and ψ 2 (x,y), and propagation constants β1 and β2, respectively. At
Q. Orbital Velocity for Low Earth Orbit Neglecting air friction an object will sustain a low altitude orbit when the centrifugal force due to its motion in a circular orbit is
Mercury is poured into a U-tube as shown in Figure given below. 100g of water is then poured into the right hand side of the tube. The density of mercury is 13.6g/cm 3 . What heigh
The opposition offered to the circular motion of bodies like sphere, disc, ring, cylinder etc. on another surface is known as rolling friction.
Arago spot (D.F.J. Arago) A bright spot which appears in the shadow of a uniform disc being backlit through monochromatic light emanating from a point source.
Explain Stokes theorem in vector calculus?
An electron in a hydrogen atom makes a transition from E 3 to E 1 . How much energy does the atom lose?
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