[physics] electromagnetic spectrum

Question 1

what is electromagnetic waves

Answer 1

electromagnetic waves are made up of oscillating electric and magnetic fields

Question 2

what type of waves are electromagnetic waves

Answer 2

transverse waves

Question 3

properties of electromagnetic waves as transverse waves

Answer 3

• the electric and magnetic fields oscillate perpendicularly to the direction of propagation of the electromagnetic waves

Question 4

do electromagnetic waves carry electric charge

Answer 4

no

Question 5

characteristics of electromagnetic waves

Answer 5

• all electromagnetic waves can travel without a medium
• all electromagnetic waves travel with the same speed of 3.0×10^8 m/s in a vacuum
• electromagnetic waves undergo reflection and refraction
• electromagnetic waves transfer energy

Question 6

wave speed equation

Answer 6

v=f人

Question 7

when electromagnetic waves travel from one medium to another, what changes?

Answer 7

• speed changes
• wavelength changes
• frequency doesn’t change

Question 8

main regions of electromagnetic spectrum (increasing freqeuncy)

Answer 8

• radio waves
• microwaves
• infrared radiation
• visible light (7 colours of rainbow)
• ultraviolet radiation
• x-rays
• gamma rays