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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.
Illustrate the demerits of ultrasonic magnetostriction method. Limitations of ultrasonic magnetostriction method: a. This can produce frequencies up to 3 MHz simply. b.
A ray of white light in air passes by a glass plate. Refraction takes place. The direction in which the light is travelling changes. For what colour of light is the alteration in d
What do you understand by reverberation time an auditorium What do you mean by sound absorber. Give two examples for good absorbers.
describe young''s double slits experiments for interference of light ?
Find an expression for the angular frequency A small object oscillates back and forth at the bottom of frictionless hemispherical bow. The radius of the bowl is Rwanda the angle
what does slope of the tangent drawn on velocity -time graph at any instant of time give?
Q. Define: Thomson effect. Thomson recommended that when a current flows through unequally heated conductors heat energy is absorbed or evolved throughout the body of the meta
Q. Explain Snells Law? It is believed that Snell developed his well-known equation by purely empirical means. He made various measurements of the refracting properties of vario
Question 1. Discuss the quality control measures for ultrasound equipment? 2. What are the different kinds of transducers available? How will you select the appropriate tran
Gray; Gy (after L.H. Gray, 1905-1965): The derived SI unit of absorbed dose, described as the absorbed dose wherein the energy per unit mass imparted to the matter through ion
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