All Questions
7 questions
56
votes
2
answers
6k
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Neutrinos vs. Photons: Who wins the race across the galaxy?
Inspired by the wording of this answer, a thought occurred to me. If a photon and a neutrino were to race along a significant stretch of our actual galaxy, which would win the race?
Now, neutrinos ...
user10851
18
votes
3
answers
4k
views
Why are neutrinos more weakly interacting than light?
When people describe neutrino interactions they describe them as rare/infrequent due to the fact that the neutrinos are electrically neutral and have little mass, if any. Well why then is the photon ...
- 191
8
votes
4
answers
6k
views
How do neutrinos pass through the sun so quickly?
If it takes thousands of years for light to escape our sun then how can neutrinos generated in the very center of the sun reach earth in just 8 minutes? Why is their speed so great that they can ...
- 835
6
votes
3
answers
6k
views
Which is the lightest thing in this universe? Is that a photon or neutrino?
I hear a lot of people saying that neutrino is the lightest subatomic particle but according to me a photon must be the lightest as nothing can travel faster than light because it gets heavier and ...
20
votes
2
answers
7k
views
Sun light takes 1,000/30,000/100,000/170,000/1,000,000 years bouncing around inside to then reach the Earth
When light (photon particle) is generated inside the Sun, it takes a long time to bounce around inside to later escape and travel outwards.
Neutrinos escape immediately.
The numbers for the years ...
- 548
8
votes
3
answers
1k
views
If a neutrino has a rest frame, why can't a photon have a rest frame as well?
Concerning Rest Frame Wikipedia states:
For example, in the rest frame of a neutrino particle travelling from the Crab Nebula supernova to Earth the supernova occurred in the 11th Century AD only ...
- 221
-2
votes
1
answer
386
views
Do we have any evidence of slower-than-light neutrinos? [duplicate]
I'm writing a piece on the electron neutrino. There's plenty of excellent material out there, but I'm struggling to find anything definitive about their speed. There is for example evidence from ...
- 11.3k