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AP Physics 2: Algebra-Based Practice Quiz: Electromagnetic Waves

Written by AP Content Team, Verified for 2026 AP Exams, Last updated: May 2026

Test your understanding with short quizzes. This quiz has 10 questions to check your progress.

Question 1 of 10

What are the fundamental components that constitute an electromagnetic wave?

All Questions (10)

What are the fundamental components that constitute an electromagnetic wave?

A) Oscillating electric and magnetic fields

B) A stationary medium of particles

C) Longitudinal compressions and rarefactions

D) A constant, uniform electric field

Correct Answer: A

According to the provided content, electromagnetic waves consist of oscillating electric and magnetic fields.

Which statement best describes the orientation of the electric and magnetic fields within an electromagnetic wave?

A) They are parallel to the direction of wave propagation.

B) They are parallel to each other.

C) They are mutually perpendicular to each other.

D) Their orientation is random and unrelated.

Correct Answer: C

The content explicitly states that the oscillating electric and magnetic fields of an electromagnetic wave are mutually perpendicular.

What is a key property of electromagnetic waves regarding their propagation?

A) They require a solid medium to travel.

B) They can only travel through a gas.

C) They do not need a medium through which to propagate.

D) They travel fastest in a dense liquid medium.

Correct Answer: C

The provided text states that electromagnetic waves do not need a medium through which to propagate, allowing them to travel through the vacuum of space.

Which of the following lists electromagnetic waves in the correct order of *decreasing* wavelength?

A) Gamma rays, X-rays, Ultraviolet, Visible

B) Microwaves, Radio waves, Infrared, Visible

C) Radio waves, Microwaves, Infrared, Visible

D) Visible, Ultraviolet, Infrared, X-rays

Correct Answer: C

The content provides the order of electromagnetic waves by decreasing wavelength as: radio waves, microwaves, infrared, visible, ultraviolet, X-rays, and gamma rays. Option C correctly lists the first four in this sequence.

Based on the provided spectrum, which type of electromagnetic radiation has a shorter wavelength than visible light but a longer wavelength than gamma rays?

A) Radio waves

B) Infrared

C) Microwaves

D) X-rays

Correct Answer: D

The spectrum is ordered by decreasing wavelength: ...Visible, Ultraviolet, X-rays, Gamma rays. Therefore, X-rays have a shorter wavelength than visible light and a longer wavelength than gamma rays.

An astronomer detects radiation from a distant star. If this radiation has a wavelength that falls between that of microwaves and visible light, what type of radiation is it?

A) Infrared

B) Ultraviolet

C) X-rays

D) Radio waves

Correct Answer: A

According to the order of decreasing wavelength (Radio waves, Microwaves, Infrared, Visible...), infrared radiation is located between microwaves and visible light.

Of the categories provided, which type of electromagnetic wave possesses the longest wavelength?

A) Gamma rays

B) Visible light

C) Radio waves

D) Infrared

Correct Answer: C

The content lists the categories in order of decreasing wavelength, starting with radio waves. This means radio waves have the longest wavelength in the given list.

All of the following are described as properties of electromagnetic waves in the provided text EXCEPT:

A) They are composed of oscillating, mutually perpendicular fields.

B) They require a medium for propagation.

C) They include types such as infrared and ultraviolet rays.

D) They can be ordered by decreasing wavelength.

Correct Answer: B

The text explicitly states that electromagnetic waves do NOT need a medium through which to propagate. The other options are all properties mentioned in the content.

Given that the wavelength of electromagnetic waves ranges from kilometers to picometers, which category would be found at the picometer end of the spectrum?

A) Radio waves

B) Microwaves

C) Visible light

D) Gamma rays

Correct Answer: D

The content states the spectrum is listed in order of decreasing wavelength, from kilometers (radio waves) to picometers. The last category listed, gamma rays, would therefore correspond to the shortest wavelengths, which are in the picometer range.

In the electromagnetic spectrum, which type of wave is immediately adjacent to visible light on the longer wavelength side?

A) Ultraviolet

B) Infrared

C) Microwaves

D) X-rays

Correct Answer: B

The provided order of decreasing wavelength is ...Microwaves, Infrared, Visible, Ultraviolet... This means that infrared has a longer wavelength than visible light and is immediately adjacent to it in the spectrum.