Electromagnetic Radiation

Question 1

What surrounds an electric current?

Answer 1

Magnetic field

Question 2

What surrounds a changing electric current?

Answer 2

Changing magnetic field

Question 3

What produces regular electromagnetic waves?

Answer 3

Regular oscillation of charges

Question 4

Define electromagnetic radiation

Answer 4

The transfer of energy due to the mutual induction of oscillating electric and magnetic fields

Question 5

How can we classify electromagnetic waves?

Answer 5

The electromagnetic spectrum

Question 6

Einstein conlcuded what about electromagnetic radiation? What is it known as?

Answer 6

That it could be shown as a beam of particles. Known as photons

Question 7

What is the formula for energy?

Answer 7

E=hf=hc/λ

Question 8

Name in order of increasing frequency, the main regions in the spectrum

Answer 8

Radio, microwave, infrared, visible light, ultraviolet, x ray, gamma ray

Question 9

Name two types of electromagnetic radiation that have high penetrative power

Answer 9

Gamma rays and x-rays