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Science Year 9 Semester 2 > Electromagnetic radiation > Flashcards

Electromagnetic radiation Flashcards

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1
Q

Amplitude

A

The maximum distance a wave extends beyond its middle position

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2
Q

Colour filter

A

A transparent material that allows light of a particular colour to pass through

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3
Q

Dispersion

A

Splitting of white light into separate colours

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4
Q

Electric field

A

A region of electrical influence in which charged particles will move

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5
Q

Electromagnetic radiation

A

Electromagnetic waves consisting of oscillating electric and magnetic fields travelling at the speed of light

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6
Q

Electromagnetic spectrum

A

The entire range of frequencies of electromagnetic radiation, from high frequency gamma rays to low frequency radio waves

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7
Q

Electromagnetic wave

A

Transverse electric and magnetic fields positioned at right angles to each other and travelling through empty space at the speed of light

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8
Q

Electromagnetism

A

The phenomenon of electric and magnetic fields interacting with each other

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9
Q

Fluoresce

A

Absorb UV light and emit visible light

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10
Q

Frequency

A

Number of waves produced each second

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11
Q

Gamma rays

A

Extremely high frequency electromagnetic radiation emitted by radioactive materials

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12
Q

Infrared radiation

A

Electromagnetic radiation with wavelengths slightly longer than red light, detected by skin as heat

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13
Q

Magnetic field

A

Region of magnetic influence in which a magnetic object will move

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14
Q

Microwaves

A

Electromagnetic radiation with wavelengths ranging from fractions of a mm to tens of cm, used in comm and cooking

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15
Q

Optical fibre

A

A narrow tube of glass or plastic used to transmit pulses of light

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16
Q

Polarised

A

Electromagnetic radiation that is oscillating in a single plane

17
Q

Radio waves

A

Electromagnetic radiation with wavelengths ranging from less than cm to hundreds of km, used in comm

18
Q

Scattering

A

The interaction of light with particles in the atmosphere, depending on the colour and frequency of the light

19
Q

Secondary colours of light

A

Cyan, yellow and magenta

20
Q

Primary colours of light

A

Red, blue and green

21
Q

Ultraviolet light

A

Electromagnetic radiation with frequencies just above violet light, contained in sunlight

22
Q

Visible spectrum

A

the range of colours that can be seen by the eye

23
Q

Wave motion

A

The transfer of energy without transferring matter

24
Q

X-rays

A

high frequency electromagnetic radiation that can penetrate materials.

Science Year 9 Semester 2 (5 decks)

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