Define Fermats principle
Fermat's principle: principle of least time (P. de Fermat): The principle, put onward by P. de Fermat that explains the path taken by a ray of light among any two points in a system is for all time the path which takes the least time.
Newton's law of universal gravitation (Sir I. Newton): Two bodies exert a pull on each other with equivalent and opposite forces; the magnitude of this force is proportional to the product result of the two masses and is too proportional to the invers
Cosmological redshift: The effect where light emanates from a distant source appears redshifted since of the expansion of the space time itself.
As shown in the figure below, a source at S is sending out a spherical wave: E1=(A×D/r) cos(wt-2πr/λ); where r is the distance to source
Briefly explain the reason why does sun emerge flat throughout sunrise and sunset?
What do you mean by the term curvilinear motion? State in brief?
Lyman series: The sequence that explains the emission spectrum of hydrogen whenever electrons are jumping to the ground state. Each and every line is in the ultraviolet.
Explain Ampere's law? Ampere's law (A.M. Ampere):
Hawking radiation (S.W. Hawking; 1973): The theory which black holes emit radiation similar to any other hot body. The virtual particle-antiparticle pairs are continuously being made in supposedly empty space. Infrequently, a pair wil
What do you mean by the term crest? Briefly illustrate it.
What is main difference between secondary electron image and the back scattered electron image? State briefly.
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