3D.1 Wave-Particle Duality

Question 1

what is Huygens principile

Answer 1

very simply Huygens principle states that every single point on a wavefront is a source of circular waves traveling forward where all the superpositions of the waves make up a new wavefront

Question 2

why is light considered a wave

Answer 2

1, it undergoes both destructive and constructive interference

2. it forms a superposition
3. it undergoes polarisation

Question 3

what are photons

Answer 3

packets of electromagnetic radiation energy (E=hf)

Question 4

what is the formula for calculating the energy of a photon

Answer 4

E = hf

Question 5

what is the value for plank constant

Answer 5

6.63 x 10^-34 J s

Question 6

why can’t we have a photon with lower energy than plan constant

Answer 6

because it is the lowest possible step in energy

Question 7

what is quantisation

Answer 7

it is a system in which there is the smallest minimum amount by which the quantity can change

Question 8

what is the speed of electromagnetic waves

Answer 8

3 x 10^8

Question 9

why is an electron a particle

Answer 9

because it has a fixed mass and charge

Question 10

are electrons waves

Answer 10

when electrons travel really fast they show wave-like behavior with forming a diffraction pattern when passing through gaps and also forming interference pattern when they pass through a double-slit apparatus

Question 11

what is the evidence that makes light act like a particle

Answer 11

the photoelectric effect

Question 12

what is wave-particle duality

Answer 12

it is the principle that a substance can behave as a wave under certain circumstances and a particle under certain circumstances