Electromagnetic waves

Question 1

What type of waves are EM waves

Answer 1

• All EM waves are transverse waves

Question 2

What is the same about all EM waves

Answer 2

• All EM waves travel at the same speed
• This is 3 x 10^8 m/s in a vacuum
• This speed varies in different mediums (refraction)

Question 3

What differentiates different EM waves

Answer 3

• All EM waves have different wavelengths and frequency
• These two are inversely related (as one increases, the other decreases)
• This means that the speed is always the same of all waves

Question 4

What is the entire EM spectrum

Answer 4

• Radio waves
• Microwaves
• Infrared waves
• Visible light
• Ultraviolet
• X-rays
• Gamma rays

Question 5

Which waves are used in communication

Answer 5

• Radio waves
• Microwaves

Question 6

Which waves are considered ionising

Answer 6

• Ultraviolet
• X-rays
• Gamma rays

Question 7

What is visible light

Answer 7

• Light that can be seen by the human eye
• All of the colours

Question 8

Where do EM waves come from

Answer 8

• EM waves come from everywhere