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S3 - Physics > Telecomunications > Flashcards

Telecomunications Flashcards

1
Q

Wave length

A

The minimum distance in which the wave replaces itself

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2
Q

Amplitude

A

The maximum displacement of a wave from its zero position

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3
Q

Transverse wave

A

A wave in which the particles of the medium are vibrating perpendicular to the direction of the energy transfer

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4
Q

Frequency

A

The number of complete wave either produced by a source or passing a point , each second

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5
Q

Longitudinal wave

A

Vibrations of the medium are parallel to the direction of travel

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6
Q

Period

A

The time it takes for one complete wave to either be produced by a source or pass a fixed point

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7
Q

Transverse

A

Vibrations of the medium are perpendicular to the direction of travel

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8
Q

What is Reflection

A

It’s when light hits a surface and transmits through it, absorbed or reflected by it

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9
Q

Law of reflection

A

The angle of reflection is equal to the angle of incidence

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10
Q

Reflection - normal

A

Line perpendicular to the surface

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11
Q

Reflection - incidence Ray

A

The ray of light going towards the reflection point

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12
Q

Reflection - ray

A

Ray of light going away from the reflection point

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13
Q

Reflection - angle of incidence

A

Angle between the normal and incidence ray

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14
Q

Reflection - angle or reflection

A

The angle between the normal and reflection ray

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15
Q

Reflection - concave

A

Reflect of the inside of a curve ( e.g radars, cosmetic mirrors )

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16
Q

Reflection - focal point

A

Parallel rays reflected to converge at a point called the focal point

17
Q

Reflection - focal Lenth

A

Distance from reflector to focal point , measured in metres

18
Q

Reflection - convex

A

Outside curve of the reflector used to cause rays to come together to create a beam (e.g back of a spoon , mirror for going round blind turns - deeside entrance)

19
Q

Wave speed

A 
V = d/t ( ms-1)
Speed = distance over time

S3 - Physics (2 decks)

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