98 reputation
16
bio website
location Milan (Italy)
age
visits member for 1 year, 7 months
seen Aug 23 at 18:56

People keep on asking me why I'm so interested in physics despite my time consuming actual job, which is at the exactly opposite side of physics (I'm creative director and founder of an advertising agengy). Then, on this site, I found some 22.000 questions that answer that question.


May
4
awarded  Popular Question
Apr
4
asked Do all the 4 forces of nature act at the same speed?
Mar
19
awarded  Commentator
Mar
19
comment Speed of Universe Expansion
Hi John Rennie, in your answer you indicate the static distance (13.7 billion light years) thus neglecting the expansion of space itself (according to all sources including wikipedia, the size of the observable universe is 92-94 billion light-years, that means that the distance from earth to the edge of the observable unverse should be around 46-47 billion light years). Is that a mistake or did you put that value on purpose? (or am I missing something?) In any case, even according to that value, d should be 13.7/2. Correct?
Mar
6
awarded  Nice Question
Mar
5
awarded  Enthusiast
Mar
4
comment Why can't we store light in the form of light?
I could eventually access the page. Many thanks.
Mar
4
comment Why can't we store light in the form of light?
Thanks bharal very interesting indeed.
Mar
4
comment Why can't we store light in the form of light?
@TobiasKienzler thanks, I got it. Very much clear. ps the analogy with the stomach was due to lunch time here in Italy :-)
Mar
4
comment Why can't we store light in the form of light?
Thanks Chris...I'm going to store your enlightening answer:-)
Mar
4
accepted Why can't we store light in the form of light?
Mar
4
comment Why can't we store light in the form of light?
Sorry Tobias, I'm missing something here (and it is for sure my fault). Isn't what you are saying true for all the things that begin to release their energy in the very moment in which we store them? According to what you say an airplane which is air-to-air refueling in not storing the fuel in the tank of the other plane, because it is just delaying the moment in which it will fall. And storing food in our stomaches is just delaying the moment in which we will be hungry again. Where is my misconception?
Mar
4
comment Why can't we store light in the form of light?
Many thanks John, I definitely got your points related to batteries and magnetes. Coming to storing light between two mirrors vs storing heat or cold is clear again your point from a physicist's perspective, even though my question was actually related to storing significant amounts of light (i.e. useful for many and different purposes). In this case, my next question would be how light "stored" between two (or millions of) mirrors could prove itself useful. p.s. no way to access your link
Mar
4
awarded  Supporter
Mar
3
asked Why can't we store light in the form of light?
Mar
1
comment Do all forces act in the same way where gravity is close to zero?
Well, I actually said that the sphere is totally filled with water. Marbles are at the bottom, not water.
Feb
27
accepted Do all forces act in the same way where gravity is close to zero?
Feb
27
comment Do all forces act in the same way where gravity is close to zero?
Many thanks deadly, I knew that I was neglecting something there. Right: water viscosity is the answer.
Feb
27
asked Do all forces act in the same way where gravity is close to zero?
Feb
25
awarded  Student