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Electromagnetic Radiation and Its Applications Quiz

#1

Which of the following electromagnetic waves has the shortest wavelength?

Gamma rays
Explanation

Highest energy, shortest wavelength radiation.

#2

What is the primary application of infrared radiation?

Night vision
Explanation

Used in devices to detect heat signatures.

#3

What is the speed of light in a vacuum?

300,000 km/s
Explanation

Universal constant in a vacuum.

#4

Which electromagnetic radiation is responsible for sunburns?

Ultraviolet rays
Explanation

Can cause DNA damage in skin cells.

#5

Which electromagnetic radiation is used in microwave ovens for heating food?

Microwaves
Explanation

Penetrates food, causing water molecules to vibrate.

#6

Which electromagnetic wave is used for communication with satellites?

Microwaves
Explanation

Longer than infrared but shorter than radio waves.

#7

What is the primary function of a Faraday cage?

To block electromagnetic radiation
Explanation

Protects from external electromagnetic fields.

#8

What is the primary application of visible light?

Phototherapy
Explanation

Used in treatment for various medical conditions.

#9

Which electromagnetic radiation is used in Wi-Fi technology?

Microwaves
Explanation

Enables wireless networking.

#10

Which electromagnetic radiation is used in laser technology?

Visible light
Explanation

Produces coherent light for various applications.

#11

Which electromagnetic radiation is used in magnetic resonance imaging (MRI)?

Radio waves
Explanation

Excites hydrogen atoms in the body to create images.

#12

What is the primary application of gamma rays in medicine?

Cancer treatment
Explanation

Destroys cancerous cells.

#13

Which electromagnetic radiation is used in remote sensing of Earth's surface?

Microwaves
Explanation

Penetrates clouds and foliage.

#14

Which electromagnetic radiation is used in electron paramagnetic resonance (EPR) spectroscopy?

Microwaves
Explanation

Studies properties of unpaired electrons.

#15

Which electromagnetic radiation is used in photolithography for semiconductor manufacturing?

Ultraviolet rays
Explanation

Creates fine patterns on semiconductor wafers.

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