Electromagnetic Waves Test

What is the origin of electromagnetic waves?

• The rotation of planets

• The accelerated motion of electrons

• The splitting of atoms

• The reflection of light

What are electromagnetic waves made up of?

• Vibrating electric fields only

• Vibrating magnetic fields only

• Both vibrating electric and magnetic fields

• Neither electric nor magnetic fields

What color appears at the highest frequency of light we can see?

• Blue

• Green

• Red

• Violet

What characteristic do radio waves have compared to other electromagnetic waves?

• They have the shortest wavelengths

• They have the highest frequency

• They have the longest wavelengths

• They are the least used for data transmission

What is a common use for radio waves?

• To transmit light

• To transmit sound only

• To transmit data

• To cook food

Which of the following is NOT a use of radio waves?

• TV broadcasting

• Heart rate monitors

• Cell phone communication

• Cooking food

Compared to radio waves, how are microwaves in terms of wavelength?

• Longer

• The same length

• Shorter

• Variable

What is one of the uses of microwaves in communication?

• They can only travel through a vacuum

• They are absorbed by clouds and smoke

• They can penetrate clouds, smoke, and light rain

• They are mainly used for long-range communication in clear weather

What fills the universe related to microwaves?

• Cosmic microwave background radiation

• Radioactive microwave particles

• Microwave dark matter

• Microwave energy fields

Which of the following is a use of microwaves?

• Remote controls

• Bluetooth headsets

• Power generation

• Water purification