MEDIUM
Earn 100

How Heinrich Hertz discovered the existence of electromagnetic waves?
Important Questions on Development
EASY

EASY

EASY

EASY

EASY
What is the speed of a photon with respect to another photon if,
(a) the two photons are going in the same direction and
(b) they are going in the opposite direction.

MEDIUM

MEDIUM

HARD

HARD

EASY

EASY

HARD



MEDIUM
A particle moves in a closed orbit around the origin, due to a force which is directed towards the origin. The de Broglie wavelength of the particle varies cyclically between two values and with . Which of the following statements are true?

EASY

HARD

MEDIUM

HARD

HARD

