P5.2 - The Electromagnetic Spectrum Flashcards
1
Q
What is a spectrum?
A
A continuous range of frequencies
2
Q
What is the electromagnetic spectrum
A
A group of waves
3
Q
What is the order of the electromagnetic spectrum in order of decreasing wavelength
A
Radio waves
Microwaves
Infrared
Visible light
Ultraviolet
X-rays
Gamma rays
4
Q
What is the speed of light
A
3✖️10^8
5
Q
How do you calculate the frequency of EM waves
A
Frequency = wave speed ➗ wave length
6
Q
What are sources
A
Something that emits electromagnetic radiation
7
Q
What is an absorber
A
A material that absorbs EM radiation
8
Q
How are radio waves produced
A
An oscillating p.d causes electrons to move back and forwards in a wire
This produces a changing magnetic and electric magnetic field
This is a radio wave
