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| visits | member for | 1 year, 7 months |
| seen | 9 hours ago | |
| stats | profile views | 193 |
Just here to learn and share.
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2d |
comment |
What is the optical power level of common fiber optics lasers? To my limited knowledge, NL effects are a concern and manifest as pulse distortion (due to many competing effects). They are more pronounced when the pulse width is short (100ns perhaps?). This effectively puts a limit on useful bandwidth. I vaguely remember analysis using an eye-diagram to quantify the effect of distortion. |
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May 15 |
answered | How can we detect X-rays? |
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May 15 |
comment |
Light Ray Reflection from concave mirror Removed the ridiculous down-vote by adding a +1. |
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Mar 20 |
comment |
Couldn't we measure electrons with good enough technology? In my understanding, a measurement necessarily involves an interaction, and thinking simplistically, electrons interact with other electrons by exchanging photons. In theory you could have a device 'tuned" to some other interaction, then perhaps you don't have to detect photons. By measure I presume you wish to measure position? The question is not very clear. |
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Jan 30 |
awarded | Revival |
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Jan 10 |
awarded | Critic |
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Jan 8 |
answered | Calculating vertical velocity component of a particle with mass, given the hit point of parabolic motion |
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Jan 8 |
revised |
How to calculate uncertainties of a natural exponential function? Changed unc to \delta T |
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Jan 8 |
suggested | suggested edit on How to calculate uncertainties of a natural exponential function? |
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Jan 8 |
revised |
How to calculate uncertainties of a natural exponential function? Minor LaTeX formatting added. |
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Jan 8 |
suggested | suggested edit on How to calculate uncertainties of a natural exponential function? |
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Jan 8 |
answered | Good book for Analytical Mechanics |
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Jan 6 |
comment |
Eliminating IR light reflection perceived by a steep viewing angle The easiest way to accomplish your goal is as you said, add an IR filter to your camera. I would pick an "'interference" filter (eoc-inc.com/infrared_filters.htm). |
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Jan 5 |
comment |
Connection between quantum physics and consciousness As far as I can tell, there is no logical definition of consciousness that compatible with physics. |
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Jan 5 |
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Units and use of the formula of the angular acceleration? $\omega$ is angular velocity and has units of radians per second. $\frac{d\omega}{dt}$ is a small (infinitesimal) change in angular velocity with time. There seems to be something wrong with your formula as $\alpha=\frac{d\omega}{dt}$. Not sure where the extra $r$ came from? en.wikipedia.org/wiki/Angular_acceleration |
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Jan 4 |
revised |
Non-commutative property of rotation Changed associative to commutative. |
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Jan 4 |
suggested | suggested edit on Non-commutative property of rotation |
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Dec 31 |
comment |
Why can't a spaceship accelerate for ever? Since there is no friction in space There could be magnetically induced drag that can occur when a conductor moves in an external magnetic field. |
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Dec 28 |
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Can you speed up radioactive decay of plutonium? @RichartBremer, what if the rocket blows up during launch? |
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Dec 28 |
comment |
Why do we classify states under covering groups instead of the group itself? A group is an abstract mathematical object. Measurements/Experiments are in the real field. So, if you want to draw meaningful conclusions that you can verify experimentally, you have to work with operator representations (in $\mathbb{R}$) that are appropriate. Ultimately, if you cannot prove something (or its consequences) that can be experimentally verified, it is worthless. While this does not directly answer your question, I think it is a useful reminder on why we work with representations instead of abstract objects. Hence the comment. |
