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Physics : Recent Questions and Answers (Page 96)

Find answers to your questions about Physics or help others by answering their Physics questions.

How do those cheap shoebox-phone projectors throw any "decent" image?

You've probably seen them; shoebox phone projectors. They throw a very dim image, but I'm surprised it throws any image at all, since...

Asked on 08/24/2021 by RobotRock

2 answer

Solutions to Einstein Field Equations where $T_{mu nu} = 0$

My Level/Background: I have just completed my first year of undergrad. In high school, I completed AP Physics C Mechanics and Electricity and Magnetism. In my first year of undergrad,...

Asked on 08/23/2021

2 answer

How does stress "propagate" in beams?

I'm studying structural mechanics and I have been stuck on a thought.I drew a very simple cantilever beam situation. If I make a fictional cut like in my fig.1,...

Asked on 08/23/2021

2 answer

How can I interpret the equation of the orbit in Schwarzschild metric?

Given the standard geodesic equation:$$frac{d^2 x^mu}{dlambda^2}+Gamma ^mu _{sigma rho}frac{d x^sigma}{d lambda}frac{d x^rho}{d lambda}=0$$we want to apply it to the Schwarzschild metric; conceptually this simply means using the...

Asked on 08/23/2021

1 answer

Light emission of a molecule formed from two atoms

Suppose we Have an atom $A$ that can emit light with frequency $mu_1,mu_2,...$ and an atom $B$ that can emit light with frequency $nu_1,nu_2,...$.Now suppose...

Asked on 08/23/2021

1 answer

Differences between Feynman diagrams

I'm reading Weinberg's paper on "Dynamics at Infinite Momentum" in which he proves a claim about the type of Feynman diagram that contributes finitely to the perturbation series and the...

Asked on 08/23/2021

0 answer

Radius of Circular orbit of a Satellite around Earth always constant (if Space was a perfect vacuum) WHY?

The way I see it:Assuming space is a perfect vacuum, a satellite should stay in circular orbit with CONSTANT RADIUS around earth forever but I think the radius should...

Asked on 08/23/2021 by Stressed

2 answer

Can someone provide a physical -- not mathematical -- intuition for the phase in a quantum wavefunction?

I've read every thread on StackExchange (and Quora and reddit...) that I can find about a physical intuition for the phase in the quantum wave function, and I still Just....

Asked on 08/23/2021 by QuantumFumbler

13 answer

A moderate introduction to Hanbury Brown Twiss interferometry in particle physics

For astronomy, as originally invented, the Hanbury Brown Twiss interferometer is good for finding the angular diameter of stars and is not a rapidly fluctuating observable like the...

Asked on 08/23/2021 by yayu

1 answer

Derivation for number of photons assigned to to an electromagnetic field amplitude

I am trying to understand a derivation concerning the number of photons associated with an electromagnetic field which is irradiated on some probe. The point is to get a...

Asked on 08/23/2021

1 answer

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