Light in vacuum and inverse square law

AI Thread Summary
The inverse square law does apply to light in a vacuum, confirming its fundamental nature in physics. Users expressed confusion about finding reliable references, noting that Wikipedia's introduction on the inverse square law clearly states this principle. There was a light-hearted acknowledgment of overlooking the information in the source. Additionally, the importance of proper attribution for sourced material was emphasized to avoid copyright issues. Overall, the discussion reinforced the applicability of the inverse square law to light and the necessity of crediting sources.
tris_d
Messages
162
Reaction score
0
Does inverse square law apply to light in vacuum?

420px-Inverse_square_law.svg.png
 
Science news on Phys.org
DaleSpam said:
Yes.

Thanks. I tried to google but I couldn't confirm it, and Wikipedia does not mention it in either "photon" or "light" articles. Would you know what should I google for so I can find some references about it?
 
tris_d said:
Just went there for the picture, and was stupid enough not to read it. Funny!

Please note that if you took something from another source, you must attribute it to that source, or else you are stealing something! Worse still, some of these things might be copyrighted, and WE might get into a whole of trouble without making at least proper references to the sources.

Besides, it is just good practice (and manners) to give credit where credit it due.

Zz.
 
Thread 'A quartet of epi-illumination methods'

Thread 'A quartet of epi-illumination methods'

Well, it took almost 20 years (!!!), but I finally obtained a set of epi-phase microscope objectives (Zeiss). The principles of epi-phase contrast is nearly identical to transillumination phase contrast, but the phase ring is a 1/8 wave retarder rather than a 1/4 wave retarder (because with epi-illumination, the light passes through the ring twice). This method was popular only for a very short period of time before epi-DIC (differential interference contrast) became widely available. So...
View full post »

Thread 'Effective absorption coefficient of gold nanoparticles'

I am currently undertaking a research internship where I am modelling the heating of silicon wafers with a 515 nm femtosecond laser. In order to increase the absorption of the laser into the oxide layer on top of the wafer it was suggested we use gold nanoparticles. I was tasked with modelling the optical properties of a 5nm gold nanoparticle, in particular the absorption cross section, using COMSOL Multiphysics. My model seems to be getting correct values for the absorption coefficient and...
View full post »

Similar threads

Calculating distance between lux meter and light source
Replies
2
Views
2K
I Electricity and Magnetism: Verifying the Inverse Square Law
Replies
3
Views
1K
B The focal length of the eye and image inversion
Replies
10
Views
1K
Inverse Square Law with Half Value Layers for X-Rays
Replies
3
Views
2K
A Calculating the optical depth of an inhomogeous gas
Replies
1
Views
2K
B Proof of inverse square law for gravitation?
Replies
18
Views
2K
B Coulumb's Law at 1 light year distance
Replies
8
Views
1K
B How to build a simple polarization filter
Replies
11
Views
2K
I Sound pressure and inverse distance law
Replies
5
Views
2K
I Physical approximation to inverse square law using magnet(s)
Replies
12
Views
1K

Hot Threads

Recent Insights

Back
Top