All Questions
5
questions
-3
votes
0
answers
22
views
Is there an IR-camera-detectible color that can be the coat for a material to transfer the material heat by emitting into the space? [closed]
If we see a material it is coloured in a color that our brain could easly recognize. But when we look at it by the help of an IR camera it could also be coloured and if two materials have same ...
1
vote
1
answer
32
views
Absorption and emission spectrum
I was wondering how do you see a spectrum when light is passed through a substance. Like most of the substances we use are opaque, so how does light pass through them without being reflected? Also ...
- 11
1
vote
1
answer
87
views
Does polarisation matter in double slit experiment?
So I am studying diffraction, in particular the diffraction of electromagnetic waves using a double slit set up. However, there seems to be no mention of the polarisation of electromagnetic waves and ...
- 25
1
vote
0
answers
302
views
Intensity of monochromatic propagating wave in terms of electric field amplitude
I'm looking at the (local) intensity of an MC propagating wave in terms of the electric field and I found something pretty good:
\begin{equation}
\left|E\right|^2 = \frac{2I}{\epsilon_0 c}.
\end{...
- 298
7
votes
4
answers
12k
views
How do laser rangefinders work when the object surface is not perpendicular to the laser beam?
I find the functioning of a laser rangefinder confusing.
The explanation usually goes like this: "you shine a laser beam onto the object, the laser beam gets reflected and gets back to the device and ...
- 831