A photon is reflected by matter (by an electron in empty space). How long does the reflection take? (i.e. is there any infinitesimal time elapsing during the reflection process?), or more precisely, what is the time difference, the time retardation by the interaction compared to the light velocity in vacuum. A very approximate number would be sufficient for the answer.
Subscribe to:
Post Comments (Atom)
-
cosmology - The difference between comoving and proper distances in defining the observable universe"The radius of the observable universe is estimated to be about 46.5 Gly." If I understand correctly, it means the most distant ob...
-
Everyone always talks about the efficiency of their appliances. I was wondering if everything was 100% efficient at heating its surroundings...
-
Are C1, C2 and C3 connected in parallel, or C2, C3 in parallel and C1 in series with C23? Btw it appeared as a question in the basic physics...
No comments:
Post a Comment