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Senior High School: 11th and 12th Grade
Physics
Physics - Communication With Transverse Waves
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Q.1
Which of the following members of the electromagnetic spectrum has the highest frequency?
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Gamma radiation
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X-rays
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Infrared radiation
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Microwaves
Q.2
Why do some people object to mobile telephone masts being erected near their homes?
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They interfere with TV signals
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They make a loud humming noise
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They believe that the microwaves are harmful to health
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They attract a lot of birds which leave their droppings on their houses and cars
Q.3
Why are microwaves used for communicating with satellites?
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Microwaves are not refracted by the Earth's atmosphere
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Microwaves are refracted by the Earth's atmosphere
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Microwaves are the only waves that can travel through space
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Other types of wave are not powerful enough to reach that far
Q.4
Which of the following is a disadvantage of wireless communication?
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The signals can be blocked by thick walls
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Wireless devices must be in range of the transmitter
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Wireless devices can be made to be portable
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Atmospheric conditions can cause a loss of signal
Q.5
Which of the following is used in remote control devices for TV's, radios and similar appliances?
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Gamma radiation
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X-rays
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Infrared radiation
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Microwaves
Q.6
Which of the following members of the electromagnetic spectrum has the longest wavelength?
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Visible light
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Infrared radiation
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Microwaves
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Radio waves
Q.7
Which type of electromagnetic radiation travels the slowest?
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They all travel at the same speed
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Infrared radiation
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Microwaves
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Radio waves
Q.8
Which of the following is a way that infrared radiation is used to transmit or receive information?
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DVD remote control
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Radiant heater
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Optical fiber broadband Internet
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Security lights
Q.9
Which type of electromagnetic radiation can be reflected by the ionosphere, a layer of charged particles in the Earth's atmosphere?
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Visible light
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Infrared radiation
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Microwaves
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Radio waves
Q.10
Why do mobile telephone users need to be in line of sight with a transmitter to get a signal?
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Radio waves cannot be diffracted
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Microwaves have too short a wavelength to be diffracted
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Infrared radiation is absorbed by trees, buildings and people
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Microwaves are easily bent upwards into space
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