If the refractive index of a medium in air is 2.0, what i...
If the refractive index of a medium in air is 2.0, what is the critical angle for this medium?
30o
42o
45o
50o
Correct answer is A
sin c = 1n = 12
c = sin-1(1n)
= 30o
For correcting long sight defects in the human eye we require a ...
The sign of the change on a charged glass rod may be determined with ...
When a ball rolls on a smooth level ground, the motion of its center is ...
The dimensions of momentum are ...
The resultant of two forces acting on an object is maximum when the angle between them is? ...
A ball is swung in a horizontal circle of centre O with a constant speed. acceleration? ...