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Y8 T2 > Phy > Flashcards

Phy Flashcards

1
Q

Light source

A

An object that produces light they are sometimes hot

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2
Q

Non-luminous

A

Describes an object that is not a source of light and to see it it has to be reflected onto

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3
Q

How does light travel?

A

It travels in straight lines and this can be shown on diagrams

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4
Q

Luminous

A

Describes an object that is a source of light

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5
Q

How do shadows form?

A

It is formed when an opaque object blocks a light source so it gets less light on that area because light cant bend in one medium

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6
Q

How does the angle of the light source affect the shadow length?

A

The closer the object is to the light source the bigger the shadow will be and the lower the angle the longer the shadow will be

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7
Q

Reflection

A

When light bounces off an opaque surface

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8
Q

Transmission

A

When the object transmits light

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9
Q

Opaque

A

A material that doesn’t transmit light

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10
Q

Transparent

A

Describes a material that all light can pass through

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11
Q

Translucent

A

Allows some light to pass though

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12
Q

What is the law of reflection?

A

The angle of incidence = the angle of reflection

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13
Q

Why do rays of light bounce off a mirror without being scattered?

A

Because it has a smooth surface

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14
Q

Where is the normal line?

A

90 degrees from the mirror

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15
Q

What is the incident ray?

A

The ray that hits the mirror

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16
Q

What is the reflected ray?

A

The ray that gets reflected from the mirror

17
Q

What is the angle of incidence?

A

The angle between the normal line and the incident ray

18
Q

What is the angle of reflection?

A

The angle between the normal line and the reflected ray

19
Q

Refraction

A

The change of direction of a light ray when it enters or leaves a transparent material

20
Q

When we go from air to liquid, what happens?

A

The light ray slows down and bends toward the normal

21
Q

When we go from air to solid, what happens?

A

The light ray slows down and bends toward the normal

22
Q

When we go from solid to air, what happens?

A

The light ray speeds up and bends away the normal

23
Q

When we go from solid to liquid, what happens?

A

The light ray speeds up and bends away the normal

24
Q

When we go from liquid to air, what happens?

A

The light ray speeds up and bends away the normal

25
Q

When we go from liquid to solid, what happens?

A

The light ray slows down and bends toward the normal

26
Q

How does a rainbow form in a rain drop?

A

First, when it enters the rain drop, it refracts and disperses. Then it reflects and it refracts on its way out because of the different mediums

27
Q

What are the colors of the spectrum?

A

Red, orange, yellow, green, blue, indigo, violet

28
Q

Dispersion

A

The splitting of white light into separate colours

29
Q

What color refracts the most?

A

Purple

Y8 T2 (8 decks)

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