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Applied Science > Waves in communication > Flashcards

Waves in communication Flashcards

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1
Q

What is refraction?

A

The bending of light as it passes from one median to another with a different density

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2
Q

What is Snells law?

A

states that the ratio of the angle of incidence to the angle of refraction of a wave as it travels through a boundary between two media is a constant termed the refractive index N

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3
Q

What is the total internal reflection?

A

When light hits a boundary at an angle greater than the critical angle and reflects within the medium

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4
Q

What is fibre optics?

A

Glass or plastic fibres used to transmit light signals with minimal loss

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5
Q

How are optical fibres applied?

A

Light signals travel over long distances with low signal loss

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6
Q

How is signal transmission applied?

A

Efficiently used in internet data transfer and networking

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7
Q

What are the wave properties in communication?

A

Amplitude
Frequency
Wavelength
Speed
All affect how signals propagate

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8
Q

Describe gamma rays?

A

High frequency
High energy radiation use in cancer treatment

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9
Q

Describe x-rays?

A

Used in medical imaging
Penetrates soft tissue

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10
Q

Describe UV light?

A

Applications in sterilisation
Tanning
Studying fluorensence

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11
Q

What is visible light?

A

The range of electromagnetic waves detectable by the human eye

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12
Q

How is visible light used?

A

Used for vision
Photography
Optical devises
Signalling

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13
Q

Describe Infrared

A

Used in remote controls
thermal imaging
data transmission over short distances

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14
Q

Describe microwaves

A

Used in cooking
satelite communications
radar

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15
Q

Describe radio waves

A

Low frequency waves
used In radio
tv broadcasting
long distance communication

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16
Q

What is intensity?

A

The power per unit area of a wave
Measured in watts per square

17
Q

What are the factors affecting intensity?

A

Distance from source and medium of propagation

18
Q

What’s the importance of intensity?

A

Determines the strength of a signal in communication systems

19
Q

What are analogue signals?

A

Continuous waves that vary in amplitude and frequency

20
Q

What are digital signals?

A

Discrete signals that use binary for information transfer

21
Q

Compare analogue and digital signals

A

Digital signals are less susceptible to noise and interference compared to analogue

22
Q

What are communication channels?

A

The medium used to transmit a signal from sender to receiver

23
Q

What are the types of communication channels?

A

Physical media like copper wires
Wireless channels

Applied Science (6 decks)

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