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Physics: Inventions and Technology > Communications > Flashcards

Communications Flashcards

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1
Q

Platen

A

Thick piece of flat wood used to press the paper against the letters

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2
Q

Proof

A

Quick copy to check for mistakes

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3
Q

Font

A

Different style of letters

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4
Q

Telegraph Key

A

Metal switch for completing an electrical circuit

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5
Q

Morse Code

A

Code using long and short signals to represent letters

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5
Q

Telegraph Receiver

A

Device containing an electromagnet making an audible click when current flows through it

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6
Q

Creator of the Telegraph and Morse Code

A

Samuel Morse

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7
Q

Telegram

A

Message sent by telegraph

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8
Q

Microphone

A

Device to translate sound waves into electrical signals

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9
Q

Fiber Optics

A

Cable consisting of hundreds of tiny glass tubes that transmit pulses of light

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10
Q

Modulation

A

Message is added to a carried signal

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11
Q

Amplitude Modulation

A

Amplitude or height of the carrier signal is modified to fit the original signal

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12
Q

Frequency Modulation

A

Frequency of the carrier signal is modified to fit the original signal

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13
Q

Amplifier

A

Device to boost the strength of an electrical signal

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14
Q

Tuner

A

Device to select the desired signal

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15
Q

Analog

A

Continuous Signal

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16
Q

Resonance

A

The natural frequency at which something vibrates

16
Q

Digital

A

Series of Pulses

17
Q

Cathode Ray Tube

CRT

A

Phosphor coated tube that translates electrical signals into pictures

18
Q

Pixel or Picture Element

A

One dot or piece of informatino on CRT

19
Q

Liquid Crystal Display

LCD or Plasma Display

A

Flat planel screen with liquid or plasma that responds to electrical signals

20
Q

Organic Light Emitting Diodes

OLED

A

A LED containing thin flexible sheets of an organic electroluminescent material, used mainly in digital display screens.

21
Q

Geosynchronous Orbit

A

A satellite orbits around the eath at the same speed that the earth is moving so that it is always above the same point on the earth

22
Q

Polar Orbit

A

A satellite moves around the earth from North Pole to South Pole and back

23
Q

Elliptical Orbit

A

A satellite move around the earth in a stretched circle around a particular part of the earth

24
Q

Global Positioning System

GPS

A

A group of satellites that orbit the earth and provide information that can be used by a receiver to accurately pinpoint the receiver’s location anywhere on earth

25
Q

Abacus

A

Mechanical device using beads to perform mathematical calculations

26
Q

Centeral Processing Unit

CPU

A

Part of computer that performs most of the calculations and controls other parts of the computer

27
Q

RAM

Acconym

A

Random access memory or short term memory

28
Q

Hard Drive

A

Device storing information in magnetic fields or long term memory

29
Q

Hardware

A

Parts of computer you can acutally touch

30
Q

Software

A

Electronic information stored or passed through a computer

Hardware - Physical
Software - Electronic

31
Q

Who is credited for the invention of the printing press?

A

Johann Gutenberg

32
Q

Who is credited for the invention of the telegraph

A

Samuel F.B. Morse

33
Q

Who is credited for the invention of the telephone

A

Alexander Graham Bell

34
Q

Who is mostly credited for the work on radio transmission

A

Guglielmo Marconi

35
Q

Who was the first scientist to discover radio waves

A

Heinrich Hertz

36
Q

Who was the first scientist to send both sound and picture using radio waves?

A

John Baird

37
Q

Who created the first working mechanical calculator?

A

Charles Babbage

38
Q

Who created the first electronic programmable calculator?

A

Konrad Zuse

Physics: Inventions and Technology (6 decks)

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