21 verified questions · ~23 minutes · answer key checked against the official NTA final key across multiple sources. Text-only questions (diagram-based excluded until they can be shown properly).
Light emerges out of a convex lens when a source of light is kept at its focus. The shape of the wavefront of the light is:
If G be the gravitational constant and u be the energy density, then which of the following quantities has the same dimensions as that of √(uG):
Answers are revealed after you attempt — that's what makes the diagnosis honest.