11.6 Electromagnetic Waves Flashcards
1
Q
List the electromagnetic spectrum in the order of decreasing frequency
A
Gamma, X-rays, ultraviolet, visible, infrared, microwave, radio
2
Q
State the relationship between the frequency and period of a wave
A
F = 1/T
3
Q
What is the equilibrium position in waves
A
The resting position for particles in the medium
4
Q
Give 2 similarities all electromagnetic waves share
A
- They travel at the same speed in a vacuum
- They oscillate in electric and magnetic fields
5
Q
State the wavelength of visible light
A
From 4 x 10^-7 to 7 x 10^-7
6
Q
Define displacement in waves
A
The distance from the equilibrium position in a particular direction, displacement is a vector therefore it can have a positive or a negative value
7
Q
State he wavelength of gamma rays
A
From 10^-10 m to 10^-16 m
8
Q
State the wavelength of microwaves
A
From 10^-1 m to 10^-3 m
9
Q
State 2 properties of electromagnetic waves
A
- transverse waves with electric and magnetic field components don’t need a medium to propagate ( to move through )
- they travel at a speed of 3 x 10^8 ms-1 in a vacuum
