Waves Transmit Information

Which one of the following is NOT a property of analog waves?

• Waves are smooth and continuous
• Waves have a step-like appearance
• Signals are susceptible to "noise" and distortion
• Signals are composed of infinite possible values

Which one of the following is NOT a property of digital waves?

• Full or "warm" sound quality
• Shallow or "cold" sound quality
• Can be used to store and transmit large amounts of information (data)
• The signals are composed of only two possible values: 0 or 1

Which one of the following supports the claim that there is an advantage of digital storage of information over analog?

• Analog storage of information is continuous and captures a more pure sound
• A copy of an analog file is never as good as its original
• Analog signals take up less storage space than digital
• Sound can be recorded using digital or analog techniques

Which one of these statements would support the claim that digitized signals are a more reliable way to transmit information?

• A digital signal can be read from a very weak signal when it is amplified
• Most movie theaters now use digital projectors to show movies.
• Fiber optic cables use light to transmit information such as sound.
• Digital devices are usually smaller than analog devices.

Which one of the following is an advantage of being able to use radio waves to transmit information in computer technology?

• Computers can store more data
• Computers can be wireless
• Computers can run faster
• Computers can be made smaller

Which one of the following is an example of an analog device?

• Smart phone
• Landline telephone
• Video game console
• Wireless computer

Which of the following devices might have "noise" such as static when used for sound?

• Compact Disc
• Mp3 player
• Vinyl Record
• A song streamed from the internet

Digital signals can easily be encoded so that transmission such as wifi can be secure. Analog signals are more difficult to encode and decode. Which one of the following conclusions does this information best support?

• Digital transmission is a better technology for encoding and transmitting data.
• Analog devices are often used in wifi devices.
• Analog transmission is an older technology
• Digital devices are often smaller than analog devices

Which one of the following is an example of a digital device?

• Cassette tape
• Vinyl Record
• Landline telephone
• Playstation Video Game Console

All of the following transmit energy / information: cell phones, walkie talkies, remote controls, and sunlight. Which one of the following statements is true regarding these transmissions?

• They are all invisible waves
• The waves all have the same frequency
• The waves travel at different speeds
• They are all electromagnetic waves