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How can light be defined in simplest form? The common explanation of 'light' (visible) is electromagnetic radiation visible to the human eye. It is only a little part of wha
Essential properties of the medium for wave propagation: (i) Elasticity: So that particle can return to their mean position, after having been disturbed. (ii) Inertia : So t
What are the applications of laser transitions? Applications of laser transitions: a. High coherence of light is helpful for measuring length precisely by interferometry or
A diffraction grating with slits separated by 3.40 x 10 -6 m is illuminated by light with a wavelength of 589 nm. The separation between lines in the diffraction pattern is 0
A 92-kg man uses a 3.05-m board to attempt to move a boulder, as shown in the diagram below. He pulls the end of the board with a force equal to his weight and is able to move it t
What is Gravity Gravity is a force which holds you in your seat. If I pull the chair out from under you, what will take place? Ouch! Gravity fast pulls you down to the floor. I
Out of ordinary and extra-ordinary waves, which wave obeys Snell's law?
What is spontaneous emission? Explain in brief. Spontaneous emission: a. This is the process by that a light source as like an atom, molecule, nano-crystal or nucleus into a
Static electricity: If electrons are removed from one material and placed on another, or if they are moved from one region of a piece of material to another, we have a separati
Constancy principle (A. Einstein): One of the postulates of A. Einstein's special theory of relativity, that puts forth that the speed of light in vacuum is calculated as the
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