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CP5 Flashcards

1
Q

Electromagnetic waves

A

A group of waves that all travel at the same speed in a vacuum and are all transverse

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2
Q

Frequency

A

The number of vibrations per second. One Hz is one wave per second.

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3
Q

Infrared

A

Electromagnetic radiation that has a longer wavelengths than visible light but shorter than microwaves. We can feel infrared radiation as warmth

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4
Q

Interface

A

The boundary between two materials

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5
Q

Refraction

A

The change in direction when a wave goes from one medium to another

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6
Q

Transverse wave

A

A wave in which the vibrations are perpendicular to the direction the wave is traveling

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7
Q

Ultraviolet

A

Electromagnetic radiation that has a shorter wavelength than visible light but a longer wavelength than x-rays

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8
Q

Vacuum

A

A place where there is no matter at all.

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9
Q

Visible light

A

Electromagnetic waves that can be detected by the human eye

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10
Q

Angle of incidence

A

The angle between an incoming light ray and the normal

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11
Q

Angle of refraction

A

The angle between the normal and a ray of light that has been refracted

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12
Q

Incident ray

A

A ray of light going towards an interface or object

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13
Q

Normal

A

An imaginary line at right angles to a surface where a ray of light hits it

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14
Q

Refracted ray

A

A ray of light that has just passed through the interface between two materials

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15
Q

Electromagnetic spectrum

A

The entire frequency range of electromagnetic waves

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16
Q

Gamma rays

A

Electromagnetic radiation with the shortest wavelengths and highest frequencies

17
Q

Microwaves

A

Electromagnetic radiation with a longer wavelength than infared but a shorter wavelength that radio waves

18
Q

Radio waves

A

Electromagnetic radiation with the longest wavelengths and lowest frequencies

19
Q

Visible spectrum

A

Electromagnetic waves that the human eye can detect. The colors that make up white light (red, orange, yellow, green, blue, indigo, violet)

20
Q

X-rays

A

Electromagnetic radiation that has a shorter wavelength than ultraviolet radiation but a longer wavelength than gamma rays

21
Q

Oscillations

A

Movements back and forth.

22
Q

Fluorescence

A

Absorbing radiation of one wavelength and re-emitting the energy at a different wavelength

23
Q

Radiotherapy

A

Cancer treatment in which a patient is given gamma radiation to kill cancer cells

ph (11 decks)

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