When you rub a plastic rod against your hair several times
and put it near some bits of paper, the pieces of papers are attracted towards
it. What does this observation indicate:
In totally reflecting prism one angle is of 90°, and other
two angles are of:
The line which passes through pole of the mirror and center
of curvature is called principal:
In compound microscope, the objective have focal length than
eye-piece:
According to coulomb’s law, what happens to the attraction
of two oppositely charged objects as their distance of separation increases:
