The push of light

You will write three small functions for the force of light on a surface. Use $c = 3.00 \times 10^{8}$ m/s.

The idea. Light of intensity $I$ falls on an area $A$. If a fraction $\rho$ of it is reflected, the force along the normal is $F = (1 + \rho)IA\cos^2\theta/c$, with $\theta$ the angle of incidence. Then $a = F/m$ and $v = at$.

Your tasks.

1. In force, return the force in N for an intensity intensity in W/m², an area area in m², a reflected fraction rho and an angle angle in degrees.
2. In acceleration, return the acceleration in m/s² for a force force in N and a mass mass in kg.
3. In speed_after_days, return the speed in m/s after days days, for a constant acceleration acc in m/s² that starts from rest.