Electromagnetic Spectrum

Which of the following types of electromagnetic radiations has the longest wavelength?

• X-rays

• visible light

• microwaves

• infrared radiations

Which of the following types of electromagnetic waves has the highest frequency?

• visible light

• microwaves

• gamma ray

• infrared ray

Which of the following can be used to detect bone fracture?

• X-rays

• Infrared

• Visible light

• Microwaves

Which of the following technology uses microwaves?

• laser

• remote control

• television

• cellphone

It was developed to use radio waves to diagnose illnesses with a strong magnet and a radio wave emitter and receiver.

• RADAR

• Cathode ray tube

• SONAR

• MRI

What vitamin is made by UV radiation to keep the bones and teeth healthy?

• Vitamin A

• Vitamin B

• Vitamin C

• Vitamin D

It is the only Electromagnetic wave that can be detected by the human eye.

• radio wave

• microwave

• visible light

• infrared ray

It can convert sound waves into electric current or signal containing words or music.

• amplifier

• microphone

• radio station

• carrier wave

Cellphones and cordless telephones are known as __________.

• amplifiers

• communicators

• transceivers

• transmitters

GPS is a system of _________ satellites.

• 20

• 24

• 28

• 32