Rainbows and Radios: The Electromagnetic Spectrum - ReadTheory

Rainbows and Radios: The Electromagnetic Spectrum

Questions: 5

Grade: 6

Words: 116

Text

Text & Questions

Text, Questions & Answers

Have you ever noticed the beautiful colors in a rainbow? Just like a rainbow has different colors, the electromagnetic spectrum includes different types of light - some we can see, and some we can't. The spectrum starts with radio waves used for TV and radio broadcasts, then comes microwaves used for heating food. The part we are most familiar with is the visible light, which helps us see. Beyond that, we have ultraviolet light that can give us sunburns, x-rays that doctors use to look inside our bodies, and gamma rays, which are used in treating cancer. Amazingly, all these waves, even though their energies differ, travel at the same speed - the speed of light!

Question 1

What type of electromagnetic waves are used for heating food?

A

Radio waves

B

Microwaves

Explanation. Microwaves are used for heating food as they cause water molecules in the food to vibrate, which produces heat.

C

Visible light

D

Ultraviolet light

E

Gamma rays

Question 2

Which type of electromagnetic waves can give us sunburns?

A

Visible light

B

Radio waves

C

Microwaves

D

Ultraviolet light

Explanation. Ultraviolet light can give us sunburns because it has enough energy to damage skin cells.

E

Gamma rays

Question 3

What is the speed of all the waves in the electromagnetic spectrum?

A

Different speeds

B

Speed of sound

C

Speed of light

Explanation. All the waves in the electromagnetic spectrum, regardless of their energy, travel at the same speed - the speed of light.

D

Half the speed of light

E

Twice the speed of light

Question 4

Which type of electromagnetic waves are used in television broadcasts?

A

Gamma rays

B

Ultraviolet light

C

Visible light

D

Microwaves

E

Radio waves

Explanation. Radio waves are used for TV and radio broadcasts due to their long wavelength and ability to carry data over long distances.

Question 5

What type of electromagnetic waves are used in treating cancer?

A

Radio waves

B

Ultraviolet light

C

Microwaves

D

Visible light

E

Gamma rays

Explanation. Gamma rays are used in treating cancer because they have a high energy that can kill cancer cells.

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