Electro Magnetic Radiation Flashcards
1
Q
Explain Dual (particle/wave) nature of electro magnetic radiation
A
Some aspects of the behaviour of electromagnetic radiation can be best explained using a wave model and some aspects can be best used using a particle model.
2
Q
What is the source of electromagnetic waves
A
The source of electromagnetic waves as an accelerating charge
3
Q
How do electromagnetic waves move
A
An electromagnetic wave propagates when an electric field oscillating in one plane produces a magnetic field oscillating in a plane at right angles to it, which produces an oscillating electric field and so on.
4
Q
List properties of electromagnetic waves
A
- Originate from accelerating electric charges
- Propagate as electric and magnetic fields that are perpendicular to each other
- Can travel through a vacuum
- Have a speed of 3x10^8 m.s^-1
5
Q
Describe a photon
A
A packet of energy found in light
