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8AP Science > Physics - Light > Flashcards

Physics - Light Flashcards

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1
Q

What is density?

A

The amount of molecules in an area

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2
Q

What is a transverse wave?

A

A light wave that has waves like the ocean. The particles travel at right angles of the medium.

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3
Q

What is a longitudinal wave?

A

Waves that are compressed and the particles travel in the direction the wave is moving.

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4
Q

What is frequency?

A

The number of crests in a second

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5
Q

What is the wavelength?

A

The distance between each crest

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6
Q

What is velocity?

A

The speed which the wave travels

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7
Q

Transparent

A

You can clearly see the objects on the other side, as all light passes through.

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8
Q

Translucent

A

Blurred image, as some light passes through, while some reflects.

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9
Q

Opaque

A

Cannot see through, as all light is reflected or absorbed

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10
Q

Refraction

A

When light passes through an object. The light bends when the object is less or more dense.

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11
Q

Refractive index

A

A measurement of density. The higher the index, the more dense.

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12
Q

Dispersion

A

Separation of white light into colours of different wavelengths.

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13
Q

What is the job of the pupil?

A

Allows light into the eye

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14
Q

What is the job of the iris?

A

Controls the size of the pupil

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15
Q

What is the job of the lens?

A

Focuses light onto the retina

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16
Q

What is the job of the retina?

A

Detects light using cells called photoreceptors

17
Q

What is the job of the optic nerve?

A

Receives signals from the retina and sends them to the brain.

18
Q

What is the job of the sclera?

A

Protects the eye and helps maintain its shape

19
Q

What is the job of the choroid?

A

Contains blood vessels, which bring nutrients to the eye.

20
Q

What is the job of the cornea?

A

Protects the front of the eye

21
Q

What is the job of the vitreous humour?

A

Helps the eye maintain its shape

22
Q

What is the job of the aqueous humour?

A

Brings nutrients to the cornea and lens, which lack blood vessels.

23
Q

What is the amplitude?

A

The distance between the equilibrium and the crest/trough

8AP Science (10 decks)

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