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In terms of early universe cosmology I often stumble over sentences like:We assume that, at sufficiently early times, reaction rates forparticle interactions are much faster than the expansion...
Asked on 12/22/2020 by jojo123456
1 answerMaybe it sounds as very stupid but I cant understand why there is possibility to summation and synergy something. So please be patient to my question :)We have 3...
Asked on 12/22/2020 by PDD
3 answerIf we were to start with the delayed choice quantum eraser setup in the attached image, what would the interference pattern look like for the photons at D0 if D3...
Asked on 12/22/2020 by QuantumDuck
1 answerI recognize that the oscilloscope is a very useful instrument. But I would like to know what are the reasons why the oscilloscope is such a useful instrument in day-to-day...
Asked on 12/22/2020 by AlmaH
1 answerThe coefficient of restitution is calculated based on the velocities of objects before and after a collision: $$C_R = -frac{v_{2f} - v_{1f}}{v_{2i} - v_{1i}}$$ The coefficient of restitution tells us...
Asked on 12/22/2020 by Limne
2 answerAn object which passes the event horizon needs a finite proper time for this. But an infinitely far observer wouldn't see that the object passes the event horizon. But if...
Asked on 12/22/2020 by Alpha001
1 answerI've seen some interesting analogies explaining why exactly Work and Heat are path function. One where the floors of a building describe the gravitational potential energy, while stairs and elevator...
Asked on 12/22/2020 by Adil Mohammed
2 answerIn Hobsons's General Relativity: An Introduction for Physicists, pg. 64,he gave two different expressions for the affine connection $Gamma'^a_{bc}$ in a transformed coordinate basis ...
Asked on 12/22/2020
1 answerAs we all know, if an optical fiber is designed with the right material and properly bent, light can be transmitted along the fiber with very little attenuation. Figure 1...
Asked on 12/22/2020 by Nguyen Duc Viet
1 answerI wish to read about the connection between groups and degeneracy in quantum mechanics, but I am not able to get a good and short reference for this. I will...
Asked on 12/22/2020 by RISHAV SAGAR
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