#1
Which of the following has the highest frequency?
Gamma rays
ExplanationGamma rays have the highest frequency in the electromagnetic spectrum.
#2
What is the speed of light in a vacuum?
300,000,000 meters per second
ExplanationThe speed of light in a vacuum is approximately 300,000,000 meters per second.
#3
What type of electromagnetic wave is used in communication via satellites?
Radio waves
ExplanationRadio waves are used in communication via satellites for long-range transmission.
#4
Which electromagnetic wave is often employed in wireless communication devices?
Microwaves
ExplanationMicrowaves are often used in wireless communication devices.
#5
Which electromagnetic wave is primarily responsible for sunburns?
Ultraviolet waves
ExplanationUltraviolet waves are primarily responsible for causing sunburns.
#6
Which electromagnetic wave is commonly used in medical imaging?
X-rays
ExplanationX-rays are commonly used in medical imaging for diagnostic purposes.
#7
What is the primary function of a microwave oven?
To heat food
ExplanationThe primary function of a microwave oven is to heat food.
#8
Infrared waves are commonly used in which of the following applications?
Detecting distant objects
ExplanationInfrared waves are used in detecting distant objects, such as in thermal imaging.
#9
Which electromagnetic wave is typically utilized in remote controls for TVs and other appliances?
Infrared waves
ExplanationInfrared waves are commonly used in remote controls for TVs and appliances.
#10
Which electromagnetic wave is often used for long-range communication?
Radio waves
ExplanationRadio waves are often used for long-range communication.
#11
Which of the following applications utilizes ultraviolet radiation?
Sterilization
ExplanationUltraviolet radiation is often used in sterilization processes.
#12
Which of the following is an application of radio waves?
Cellular communication
ExplanationRadio waves are used in cellular communication.
#13
Which electromagnetic wave is used in night vision goggles?
Infrared waves
ExplanationInfrared waves are used in night vision goggles.
#14
What is the primary application of infrared waves in thermal imaging?
Detecting gas leaks
ExplanationInfrared waves are used in thermal imaging to detect gas leaks.
#15
Which electromagnetic wave is commonly used in remote sensing for vegetation analysis?
Infrared waves
ExplanationInfrared waves are commonly used in remote sensing for vegetation analysis.