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Physics > Light > Flashcards

Light Flashcards

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1
Q

What are examples of luminous objects?

A

Flames, stars, the sun, lights.

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2
Q

What are luminous objects?

A

Objects that produce their own light

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3
Q

What are non luminous objects?

A

Objects that do not give off their own light

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4
Q

What are 3 examples of non luminous objects?

A

The moon, metals, and stones

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5
Q

What is opaque?

A

An object that does not allow light to pass through it

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6
Q

What are 3 examples of an opaque object?

A

Plastic, wood and stone

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7
Q

What does transparent mean?

A

Objects that all light passes through, letting you see through them.

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8
Q

What 3 examples of transparent objects?

A

Water, glass, and air

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9
Q

What is translucent?

A

It allows light to pass through but cannot be seen through clearly.

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10
Q

What are 3 examples of translucent objects?

A

Tinted car window, sunglasses and frosted glass

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11
Q

How do you draw a ray?

A

It is a like with an arrow on it

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12
Q

How do you draw a parallel beam?

A

4 lines with arrows on them

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13
Q

How do you draw diverging beams?

A

3 lines spreading out forwards with arrows on them

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14
Q

How do you draw converging beams?

A

Four lines spreading out fowards with arrows going backwards on them

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15
Q

What is a shadow and two types of shadows?

A

Shadows are formed when an opaque object blocks a light source. Two types are point source and extended source

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16
Q

What is an umbra?

A

An umbra shadow is a region of total darkness

17
Q

What is a penumbra?

A

A penumbra shadow is a region of partial darkness.

18
Q

What is a solar eclipse?

A

When the moon is between the earth and sun

19
Q

What is an image?

A

When an object is placed in front of a mirror

20
Q

What is a plane mirror?

A

A flat smooth reflecting surface used by regular reflection to form images

21
Q

What are the two laws of reflection?

A

The normal, incident ray and reflected ray all lie in the same place and i = r

Physics (5 decks)

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