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Physics : Recent Questions and Answers (Page 814)

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

How to add extra space dimensions linked to time?

My understanding is that extra space dimensions are added in a way such that the line element in flat spacetime is calculated by the Pythagorean theorem: $$ds^2=-c^2dt^2+dx_1^2+dx_2^2+dx_3^2+dx_4^2+...+dx_n^2$$ Now I...

Asked on 10/14/2020 by W.E.

0 answer

Why does the subclassification of fields under parity require the quantum theory?

The fields of relativistic field theory (scalars, vectors, tensors, and spinors) are all defined via their transformation properties under the restricted Lorentz group (which excludes discrete spacetime transformations, namely, parity...

Asked on 10/14/2020

1 answer

What does $oversetleftrightarrow{partial_{mu}}$ means?

I have a scalar complex field: $phi(x) = phi_{1} + i phi_{2};$ so $;phi^{*}(x) = phi_{1} - i phi_{2}$ where $phi_{1}, ; phi_{2}$ are real scalar...

Asked on 10/13/2020 by grf

1 answer

In a hypothetical ring-like space station, would an astronaut feel a centripetal force?

This is the classical example used in newtonian mechanics to explain centrifugal force. I understand that on the space station...

Asked on 10/13/2020 by Harry K.

2 answer

Mass conservation for water and oil flow

Imagine we have a U-tube with constant diameter which is filled with water and oil in its equilibrium state (where water and oil are fully separated). Then, we start...

Asked on 10/13/2020 by CuriousNik

2 answer

What is the essence of the Hanbury Brown and Twiss effect?

Wikipedia is talking about two ways of interpreting this effect. The classical way is simply calculating the intensity-fluctuation-correlation. But what is here the difference between a laser and a thermal...

Asked on 10/13/2020 by nuemlouno

0 answer

Doubt relating pure rolling

As we know, when an object perform pure rolling on a plane having friction the friction acts on the edge in the direction opposite to the direction of its translational...

Asked on 10/13/2020 by Dikshant

4 answer

Why being invariant under the Lorentz transformation is so sacred for inertial observers?

I know that equations are invariant under the Lorentz transformation in SR, and thus if the lab observer measures that the moving observer's clock runs slower, the same is done...

Asked on 10/13/2020

1 answer

Potential of a conductor

When a charge is placed on a conductor why and how does it potential increase? It was given in my book that when a charge is placed on a Conductor...

Asked on 10/12/2020 by Vibhu Mishra

1 answer

Virtual image of a virtual object

During early classes we are taught that real image of a real object is inverted with respect to the object. Similarly virtual image of a real object is erect with...

Asked on 10/12/2020 by Jady

1 answer

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