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1. What do you understand by diffraction of waves? Explain why the diffraction of sound is more easily observable than the diffraction of light?
2. The wavelength of two spectral lines are 589 μm and 588 μm. what is the minimum number of lines a grating must have in order to resolve these lines in the first order spectrum?
Illustrate the A and B coefficients of Einstein in shortly. Einstein’s A and B coefficients: Einstein suggested a mathematical expression for the existence of stimulated emi
what do you mean by nuclear fusion and fusion? explain briefly giving certain examples.
What are isobars and isotopes What will be the ratio of the radii of two nuclei of mass numbers A 1 and A 2
What is the principle of generating ultrasonic waves? The general principle comprised in generating ultrasonic waves is to reasons some dense material to vibrate very quickly.
A sprinter runs 100.0 m. If he travels at constant acceleration of 1.95 m/s2 for the first 6.00 s, and then at constant velocity for the remaining time, what was his average veloci
Explain the Process of Phase Changes Matter exists in three forms: as a solid, a liquid or as a gas. These are called phases of matter. If we take a chunk of ice (solid water) fr
CPH has long wavelength, how much it is? Answer; according relation;. If we know its mass and speed, then we can talk about CPH wavelength
Calculate the specific heat of a metal from the following data. A container made of the metal has a mass of 3.2 kg and contains 20 kg of water. A1.7 kg piece of the metal initially
If small test charge is taken as positive than why measured value of electric intensity be somewhat less than the actual value of elctric intensity and vica versa
It is the energy possessed by a body because of the interactive forces inside the object. This may be defined as the work done in assembling all the particles of a body in a exact
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