5.1 Electromagnetic Spectrum

Electromagnetic radiation is energy that travels in waves. Two types of electromagnetic waves are infrared waves and ultraviolet waves. Which of these statements describes a property that is shared by infrared waves and ultraviolet waves?

• Both waves have the same energy.
• Both waves have the same frequency.
• Both waves have the same wavelength.
• Both waves travel at the same speed in a vacuum.

Electromagnetic energy travels through space in waves. The electromagnetic spectrum includes all electromagnetic waves, arranged according to frequency and wavelength. Which of these is an example of an electromagnetic wave?

• radio wave
• sound wave
• ocean wave
• gravitational pull

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NGSS.MS-PS4-2

The visible part of the electromagnetic spectrum consists of the colors that we see in a rainbow. Different colors correspond to different wavelengths of light. Which color of visible light has the shortest wavelength?

• red
• green
• violet
• yellow

Imagine a scientist detects an electromagnetic wave with a higher frequency than that of most gamma ray waves. The scientist calls these waves delta rays. Which of these statements would be true of delta rays?

• Delta rays would travel faster than most gamma rays.
• Delta rays would have more energy than most gamma rays do.
• Delta rays would have the same wavelength as most gamma rays.
• Delta rays would have a longer wavelength than most gamma rays have.

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The full range of wavelengths of EM waves is called the ___________.

• electromagnetic radiation
• electromagnetic spectrum
• infrared
• gamma rays

Energy from the sun arrives as electromagnetic radiation with a wide range of wavelengths and frequencies. Which form of electromagnetic radiation has more energy than visible light waves?

• microwaves
• radio waves
• infrared waves
• ultraviolet waves

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The _________ radiation lies at frequencies just below the frequencies of visible light.

• infrared
• electromagnetic
• radio waves
• gamma rays

What is proportional to the energy of an electromagnetic (EM) wave?

• its gamma rays
• its total amount of charged particles
• its frequency
• its longest visible wavelength

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The table list electromagnetic waves. Which column correctly lists waves from lowest to highest frequencies?

• Column A
• Column B
• Column C
• Column D

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NGSS.MS-PS4-1

The electromagnetic spectrum includes all electromagnetic waves, from radio waves with long wavelengths and low frequencies to gamma rays with short wavelengths and high frequencies. Which statement best describes how fast these waves travel in a vacuum?

• Gamma rays travel much faster than others because they have the highest frequencies.
• High frequency waves travel somewhat faster than low frequency waves.
• Infrared waves travel faster than ultraviolet waves.
• All electromagnetic waves travel at the same speed.