Teaching JKPSC Lecturership Mock Test Series 2024-25 Physical Sciences Classical Mechanics Special Theory of Relativity
A 1-kW laser light beam is directed upward to levitate a solid aluminum sphere by focusing the beam on the sphere from below. If the sphere is floating freely in the light beam, what is its diameter? The density of aluminum is given as 2.7 g/cm3.
1
0.37
2
0.39
3
0.41
4
0.43