Quantum properties of waves

Question 1

What is the equation for the energy of a photon? And what does this equation suggest?

Answer 1

Energy emitted from electromagnetic radiation comes in discrete bundles called quanta. The energy value of a quantum is

E=hf = hc/ λ

This suggests a particulate nature of electromagnetic radiation where each light particle (photon) carries an energy that is proportional to its frequency. 
High frequency (short wavelength) → high energy
Low frequency (long wavelenth) → low energy

Question 2

What is Heisenberg Uncertainty Principle?

Answer 2

~The corpuscular-wave dualism has its consequences:
The Heisenberg Uncertainty Principle: it is impossible to determine with perfect accuracy the position and momentum of a particle simultaneously. If the position vector r is being measured, its momentum will change and vice versa.