EM Waves (History, Properties and Applications)

He contributed in developing equations that showed the

relationship of electricity and magnetism.

• Andre-Marie Ampere

• Michael Faraday

• Heinrich Hertz

• James Clerk Maxwel

Formulated the principle behind electromagnetic

induction

• Andre-Marie Ampere

• Michael Faraday

• Heinrich Hertz

• James Clerk Maxwel

Showed how a current carrying wire behaves like a

magnet.

• Andre-Marie Ampere

• Michael Faraday

• Hans Christian Oersted

• James Clerk Maxwel

Microwaves are radio waves of very short wavelength. They are used in satellite communications because they can penetrate the stratosphere – a layer of the earth’s atmosphere.

• TRUE

• FALSE

The sun is our main source of ultraviolet light.

• TRUE

• FALSE

Ultraviolet waves are visible radiation.

• TRUE

• FALSE

The electromagnetic spectrum shows a family of EM waves arranged ______________

• in alphabetical order

• in order of use and application

• in order of frequency and wavelength

• in order of luminosity of radiation emitted.

Which of the following EM waves is responsible for the food production of plants through the process called photosynthesis?

• infrared rays

• microwaves

• UV rays

• visible light

The major source of EM waves on Earth is the ________________.

• air

• atom

• bulb

• sun

Which is responsible for the production of Vitamin D in the human body?

• Microwaves

• UV rays

• visible light

• x-rays