Question

State two factors on which the position of Center of Gravity of a body depends.

Case 1: Lata cuts a potato into two halves, using a cutter which belongs to a Class II lever. She needed effort E1. Case 2: Then she cuts one half of this potato again, but this time she needed effort E2. If E1 > E2 then:

A ray of light enters a glass block from air and comes out from the opposite surface. If the angle of refraction at the first surface is not the same as the angle of incidence at the second surface, then:

A type of glass block has a refractive index of 1.8.

Name the electromagnetic radiation used to detect fake currency.