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Science > Science Chapter 6 > Flashcards

Science Chapter 6 Flashcards

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1
Q

What is a plane mirror?

A

Mirror with flat surface

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2
Q

What is the perpendicular line to the mirror called

A

the normal

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3
Q

Describe the process of Refraction

A

When light travels through two different mediums, the change of speed in the mediums can cause the light to change direction

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4
Q

What is Refraction

A

The bending of light when it travels from one medium to another

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5
Q

What direction is the bending of light in a denser substance

A

It bends toward the normal line

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6
Q

What direction is the bending of light in a less denser substance

A

It bends away from the normal line

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7
Q

What is the range of colours that can be seen in white light called?

A

It is called the spectrum

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8
Q

What are the 7 colours on the spectrum

A

Red Orange Yellow Green Blue Indigo Violet

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9
Q

What do you call the act or process of splitting light into different colours

A

dipersion

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10
Q

What is triangular prism used for?

A

for splitting up the white light into 7 diffrent colours that can refracted through slightly different angles.

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11
Q

red+green=

A

yellow

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12
Q

red+blue=

A

magenta

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13
Q

blue+ green=

A

cyan

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14
Q

red+green+blue=

A

white

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15
Q

What is the function of coloured filters?

A

to remove colours from light

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16
Q

How do traffic lights use the coloured filters?

A

The Traffic light has 3 identical white lamps and red,yellow and green coloured filters. When the seven colours of white light arrive at the red filter, only the red light is transmitted.

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17
Q

What do you call the process of filtering out one colours

A

Subtraction of Light

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18
Q

Example:
If White Light is placed before a green filter and then a red filter, what will happen?

A

When the White Light shines, only the green light will get through, but nothing will get pass the red filter because there is no red light after the green filter anymore.

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19
Q

What are non-luminous object

A

Objects that does not emit their own light

19
Q

What happens when white light shines on red and blue object

A

red and blue light are reflected

19
Q

What happens when white light shines on a black object

A

No colour is reflected

19
Q

What happens when white light shines on a green object

A

Green light is reflected

20
Q

What happens when white light shines on a white object

A

all 7 colours are reflected

20
Q

What happens when white light shines on a blue object

A

Blue Light is Reflected

21
Q

When you have 2 cubes together, 1 is red 1 is blue. What happens when the blue light shines on both of the cube?

A

The blue cube appears in blue while the red cube is black

22
Q

When you have 2 cubes together, 1 is red 1 is blue. What happens when the red light shines on both of the cube?

A

red cube appears to be red while blue cube appears to be black

23
Q

What is the shape of our galaxy, the milky way?

A

Spiral

24
Q

What are other galaxies called?

A

elliptical or irregular

25
Q

What are galaxies made of

A

stellar dust,gas,stars and solar systems

26
Q

How many galaxies are there in one universe?

A

100 billion

27
Q

How big is the galaxy?

A

1.5 trillion times the mass of the sun

28
Q

What are Asteroids made of

A

They are made from rock that orbit the Sun

29
Q

Describe the shapes of Asteroids

A

Potatoes

30
Q

What is the Asteroid Belt?

A

Asteroids that orbit the Sun between the orbits of Mars and Jupiter

31
Q

What is the name of the largest asteroid

A

Ceres

32
Q

Describe the structure of Ceres

A

Ceres has a core, a mantle and a crust. It is also covered with craters

33
Q

When light falls on a smooth surface like a mirror and the light is sent back into the same medium. This process is called___

A

reflection of light

34
Q

What does opaque mean?

A

Shadow when light shines, light cannot pass through it

35
Q

What does transparent mean

A

No Shadow when light shines, light is able to pass through it

36
Q

What does translucent mean

A

Some of the light passes through

37
Q

What is the symbol for incident and reflection called

A

Theta

38
Q

What is The symbol of Incident ray

A

θi

39
Q

What is the symbol of reflected ray

A

θr

40
Q

What is some example of reflections

A

periscope and car head light

41
Q

What causes refraction

A

when Light waves change speed when they pass across the boundary between two substances with a different density such as air and glass. At the boundary between two transparent substances

42
Q

What else can cause rainbow to form and split the sunlight

A

raindrops

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