# Electromagnetic Spectrum Quiz Questions And Answers

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Matt Balanda, BS, Science |
Physics Expert
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Matt graduated with a Master's in Educational Leadership for Faith-Based Schools from California Baptist University and a Bachelor's of Science in Aerospace Engineering and Mathematics from the University of Arizona. A devoted leader, transitioned from Aerospace Engineering to inspire students. As the High School Vice-Principal and a skilled Physics teacher at Calvary Chapel Christian School, his passion is nurturing a love for learning and deepening students' connection with God, fostering a transformative educational journey.
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What do you know about the electromagnetic spectrum? If you have a good knowledge of electromagnetic waves, play the quiz given below and evaluate yourself. Electromagnetic energy describes all the different kinds of energies released into space by stars, such as the Sun, and is made when an atom absorbs energy. The electromagnetic spectrum is a continuum of all electromagnetic waves arranged according to frequency and wavelength. Take up this quiz based on the electromagnetic spectrum. All the best!

• 1.

### What type of waves are used to transmit cellular telephone messages?

• A.

Gamma rays

• B.

• C.

Microwaves

• D.

Visible light

C. Microwaves
Explanation
Microwaves are used to transmit cellular telephone messages. Microwaves have the ability to carry large amounts of information and can easily penetrate buildings and other obstacles, making them ideal for long-distance communication. They are also able to be focused into narrow beams, allowing for efficient transmission and reception of signals. Additionally, microwaves have a frequency range that falls within the range of human hearing, making them suitable for carrying voice and data signals.

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• 2.

### Which electromagnetic waves have the shortest wavelengths and highest frequencies?

• A.

Gamma rays

• B.

• C.

X-rays

• D.

Ultraviolet rays

A. Gamma rays
Explanation
Gamma rays have the shortest wavelengths and highest frequencies among the given options. Gamma rays are a form of electromagnetic radiation that have the highest energy and are produced by the most energetic events in the universe, such as nuclear reactions and supernovae. Due to their high frequency and short wavelength, gamma rays have the ability to penetrate through most materials and are used in various fields including medicine, industry, and research.

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• 3.

### Electromagnetic waves that you can see are called:

• A.

Infrared rays

• B.

Microwaves

• C.

X-rays

• D.

Visible light

D. Visible light
Explanation
Visible light refers to the portion of the electromagnetic spectrum that is visible to the human eye. It includes all the colors of the rainbow, from red to violet. Unlike other types of electromagnetic waves such as infrared rays, microwaves, and x-rays, visible light can be detected by our eyes, allowing us to perceive our surroundings and the colors of objects. Therefore, the correct answer is visible light.

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• 4.

### The waves that have shorter wavelengths than visible light are:

• A.

TV

• B.

• C.

Ultraviolet rays

• D.

Gamma rays

C. Ultraviolet rays
D. Gamma rays
Explanation
Ultraviolet rays and gamma rays have shorter wavelengths than visible light. Ultraviolet rays have slightly shorter wavelengths than visible light, while gamma rays have the shortest wavelengths in the electromagnetic spectrum. TV and radio waves, on the other hand, have longer wavelengths than visible light.

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• 5.

### How much of the electromagnetic spectrum is visible to the human eye?

• A.

All of it

• B.

None of it

• C.

Most of it

• D.

Only a small part

D. Only a small part
Explanation
The electromagnetic spectrum consists of a wide range of wavelengths, including radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays. Out of this entire spectrum, only a small part is visible to the human eye, which is referred to as visible light. This visible light spectrum ranges from approximately 400 to 700 nanometers in wavelength.

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• 6.

### What is visible light composed of?

• A.

Gamma rays

• B.

• C.

Red, orange, yellow, green, blue and violet light

• D.

C. Red, orange, yellow, green, blue and violet light
Explanation
Visible light is composed of a spectrum of colors ranging from red to violet, including orange, yellow, green, and blue. This spectrum represents the different wavelengths of light that are visible to the human eye. Each color corresponds to a specific wavelength, with red having the longest wavelength and violet having the shortest. This is why we see objects in different colors when they reflect or emit light within this range. Gamma rays, radio waves, and radar are not part of visible light and fall outside of this spectrum.

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• 7.

### Which type of emission maps the dust between stars?

• A.

Gamma rays

• B.

Infrared

• C.

Ultraviolet

• D.

X-rays

B. Infrared
Explanation
Infrared emission maps the dust between stars because infrared light has longer wavelengths than visible light, allowing it to penetrate through dust particles. This enables astronomers to observe the heat emitted by dust, which is often found in regions where stars are forming. Infrared observations are crucial for studying the structure and composition of interstellar dust clouds, as well as for detecting and characterizing young stars and planetary systems embedded within these clouds.

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• 8.

### Radioactive materials can cause this type of emission:

• A.

Gamma rays

• B.

• C.

X-rays

• D.

Ultraviolet

A. Gamma rays
Explanation
Gamma rays are a type of high-energy electromagnetic radiation emitted by radioactive materials. They are a form of ionizing radiation, which means they have enough energy to remove tightly bound electrons from atoms, leading to potential damage to living cells and genetic material. Gamma rays have extremely short wavelengths and high frequencies, making them one of the most penetrating forms of radiation.

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• 9.

### Which of the following is correct in order of lowest to highest energy?

• A.

X-rays, Visible Light, Microwave

• B.

Microwave, Visible Light, Gamma-rays

• C.

Ultraviolet, Visible Light, Gamma-rays

• D.

Ultraviolet, Gamma-rays, Visible Light

B. Microwave, Visible Light, Gamma-rays
Explanation
The given answer is correct because it arranges the types of electromagnetic radiation in order of increasing energy. Microwaves have the lowest energy, followed by visible light, and then gamma-rays have the highest energy.

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• 10.

### What quantity is constant in all EM waves?

• A.

Mass

• B.

Speed

• C.

Energy

• D.

All of the above

B. Speed
Explanation
The correct answer is speed. In electromagnetic waves, such as light, the speed remains constant in a vacuum, which is approximately 3 x 10^8 meters per second. This is known as the speed of light and is a fundamental constant in physics. The mass and energy of the waves can vary, but the speed remains the same.

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Matt Balanda |BS, Science |
Physics Expert
Matt graduated with a Master's in Educational Leadership for Faith-Based Schools from California Baptist University and a Bachelor's of Science in Aerospace Engineering and Mathematics from the University of Arizona. A devoted leader, transitioned from Aerospace Engineering to inspire students. As the High School Vice-Principal and a skilled Physics teacher at Calvary Chapel Christian School, his passion is nurturing a love for learning and deepening students' connection with God, fostering a transformative educational journey.

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• Apr 19, 2024
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Expert Reviewed by
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• May 13, 2010
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