(a) State Heisenberg's uncertainty principle.
(b) Mention two phenomena that can only be explained in terms of the particulate nature of light.
Verified Correct Answer: .
Physical Principles & Numerical Solution
(a) Heinsenberg's uncertainty principle states that it is impossible to determine simultaneously the exact position and exact momentum of a particle
(b) Black body radiation - Photo electricity.
Source: Myschool Past Questions Archive (Record #54669)