- #1
Cheman
- 235
- 1
Radiation Pressure...
I read on a website about relativity that "Before Einstein, it was known that a beam of light pushes against matter; this is known as radiation pressure. This means the light has momentum. A beam of light of energy E has momentum E/c." My question is how do we know there is this radiation pressure? Are there any examples where it has occured?
Also, why is the momentum of light equal to E/c?
Thanks.
I read on a website about relativity that "Before Einstein, it was known that a beam of light pushes against matter; this is known as radiation pressure. This means the light has momentum. A beam of light of energy E has momentum E/c." My question is how do we know there is this radiation pressure? Are there any examples where it has occured?
Also, why is the momentum of light equal to E/c?
Thanks.