In a space lab a 25- sheet of aluminum foil having mass 6.7 e -6 kg is subjected
ID: 1325291 • Letter: I
Question
In a space lab a 25- sheet of aluminum foil having mass 6.7 e -6 kg is subjected to a laser beam of intensity on one side 100 w^2/m and to a beam of intensity on the opposite side60 w^2/m , the radiation in each case hitting with normal incidence. If both of the aluminum foil sides are considered to be totally reflective and the foil is floating in the space lab, what acceleration of the foil will result from the net force from the incident beams? Show All work
1.) 1.5e-4
2.) 2.5 e-4
3.) 4.0 e -4
4.) 1.0 e-4
Explanation / Answer
Net intensity = 100 - 60 W/m^2
= 40 W/m^2
Net power = 2*40 * 25 / 10000
= 0.2 W
hence
E = 0.5 mv^2
v = 244.3 m/s
a = P/mv
= 122.2 m/s^2