- #1
premed
- 10
- 0
Helpppp please. EM Radiation doesn't make sense to me
Hi. I don't see how you would get the answers to these questions.
1) A beam of light is shone on two sheets of paper, one of which is perfectly absorbing black and the other perfectly reflecting white. If the radiation pressure on the white paper is "p", the radiation pressure on the black paper will be ...
p/2. How is this the answer? What equation would you use and what does it mean conceptually?
2) A ray of light follows the path shown as it reaches the boundary between two transparent materials( the ray bounces off and reflects at the point of incidence. It stays in the material with index of refraction n1 and doesn't go into material with index n2). What could you conclude about the relative indexes of refraction of these two materials? the answer is n1>n2 but i don't get why. If the ray would travel faster in material 2 (n=(c/v), why would it reflect off rather than refracting through it? Please explain why it reflects both conceptually and quantitavely if possible. Thx
Hi. I don't see how you would get the answers to these questions.
1) A beam of light is shone on two sheets of paper, one of which is perfectly absorbing black and the other perfectly reflecting white. If the radiation pressure on the white paper is "p", the radiation pressure on the black paper will be ...
p/2. How is this the answer? What equation would you use and what does it mean conceptually?
2) A ray of light follows the path shown as it reaches the boundary between two transparent materials( the ray bounces off and reflects at the point of incidence. It stays in the material with index of refraction n1 and doesn't go into material with index n2). What could you conclude about the relative indexes of refraction of these two materials? the answer is n1>n2 but i don't get why. If the ray would travel faster in material 2 (n=(c/v), why would it reflect off rather than refracting through it? Please explain why it reflects both conceptually and quantitavely if possible. Thx