The correct statements among the following are:(Consider only normal incidence)

Options

A. Pressure exerted by photons for perfectly reflecting surface is `(2I)/C`
B. Force exerted by photons on a perfectely reflecting surface is `(2P)/C`
C. Impulse applied by photon on a perfectely reflecting surface is `(2E)/C`
D. Force exerted by photons on a perfectly reflecting surface is `P/C`

Explanation

Pressure=`I/C(1+r)` where I is the intensity
`F=P/C` (1+r) where P is the power
Impulse I=E/C (1+r)
where E is the energy
r is the reflection coefficient.
and r=1 for perfectely reflecting surface.
Choice (d) is wrong.