Wavelengths and Colors: Order of Ideas

Read about light waves, then put its ideas in the order the passage gives them.

Story Brief #352

Waves of light are a type of electromagnetic radiation that travels in the form of energy.

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Waves of light are a type of electromagnetic radiation that travels in the form of energy. Light waves move through space at a speed of about 299,792 kilometers per second (or roughly 186,282 miles per second). Unlike sound waves, which require a medium like air or water to travel, light can move through a vacuum. Light waves have different wavelengths, which determine their color; for instance, blue light has a shorter wavelength than red light.

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A common example of light waves in action is a rainbow, which forms when sunlight passes through rain droplets, bending and separating into different colors. This bending is called refraction, and it happens because light waves change speed as they enter and exit the water droplets. Understanding light waves helps us appreciate the beauty of natural phenomena and the science behind technologies like lasers and fiber optics.

Question 1

1 of 2

Which of these ideas comes first in the passage?

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Question 2

2 of 2

What comes right after this sentence: “Light waves move through space at a speed of about 299,792 kilometers per second (or roughly 186,282 miles per second).”

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Wavelengths and Colors: Order of Ideas

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