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Physics S4- Waves And Radiation > Revision > Flashcards

Revision Flashcards

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1
Q

What are waves?

A

Waves carry energy from one place to another and can be used to transmit signals.

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2
Q

What is wavelength?

A

Distance from one point on a wave to an identical point on the next wave

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3
Q

What is wavelength measured in? Symbol?

A

Meters, lambda

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4
Q

What is amplitude?

A

Size of maximum disturbance from the centre line/ top of wave till the middle line

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5
Q

What is period?

A

Time taken for one full wave to pass a point

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6
Q

What is period measured in? Symbol?

A

Seconds, T (capital)

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7
Q

What is wave speed?

A

Distance travelled by a wavelength in one second

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8
Q

What is wave speed measured in? Symbol.

A

Metres per second (m s-1), v

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9
Q

How do you measure wave speed?

A

Wave speed= distance travelled divided by time

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10
Q

What is frequency?

A

Number of waves per second

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11
Q

What is frequency measured in? Symbol?

A

Measured in hertz (Hz), f

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12
Q

How can u get the frequency of a wave?

A

Frequency= number of waves divided by time

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13
Q

How do transverse waves travel?

A

At 90 degree angles

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14
Q

Examples of transverse waves are?

A

Water waves and electromagnetic waves

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15
Q

How do longitudinal waves travel?

A

The same direction as the direction of motion if the wave

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16
Q

Examples of longitudinal waves are?

A

Sound waves and shock waves

17
Q

How are all sounds produced?

A

All sounds are produced by vibration object, e.g. guitar strings, drums skins or human vocal cords.

18
Q

What is the speed of sound in air measured as?

A

340 m s-1

19
Q

What is the speed of the electromagnetic waves?

A

300,000,000 m s-1

20
Q

What are the waves in the electromagnetic spectrum?

A 
Radio waves
Microwaves
Infrared Light
Visible Light
Ultraviolet Light
X-rays
Gamma Rays
21
Q

What waves have the most energy in the electromagnetic spectrum?

A

Gamma rays

22
Q

What waves have the least energy in the electromagnetic spectrum?

A

Radio waves

23
Q

What can nuclear radiation be used for?

A

Sterilising medical/surgical equipment
Killing cancer cells
Smoke alarms

24
Q

What is diffraction?

A

Diffraction is the bending of waves around a barrier or through a gap.

25
Q

What type of particles cause the most ionisation?

A

Alpha particles

26
Q

What causes the least radiation?

A

Gamma rays

27
Q

What is half-life?

A

Half-life is the time for the activity for the activity of a radioactive source to halve

Physics S4- Waves And Radiation (1 decks)

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