Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Science Yr 8 > Light > Flashcards

Light Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

What is light?

A

Light is a transfer of energy from one store of energy to another

Like when you move food from the cupboard to your mouth!
So true bruv!!

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What form is the energy of light transmitted in?

A

The form of waves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Does light need a medium to travel through?

Eg. Water, air, brick

A

Nope! And the waves can still travel very fast over very long distances!

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What direction does light travel?

A

IN A STRAIGHT LINE
not a wonky one
not a zigzag one
A STRAIGHT ONE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

When does light stop?

A

Light travels through a medium until it hits another object

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What are light rays?

A

Light rays are an imaginary line that shows the direction in which light is travelling

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is darkness?

A

An absence of light
no light at tall
None
Why are you still reading this

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What does luminous mean?

A

Something that emits light

Like a lightbulb

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What are the rules of drawing Ray diagrams?

A
  • Use a ruler
  • Use a pencil
  • Use an arrow to show direction
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Why can you not see far away things really really well?

A

Because light rays spread out so less light reaches your eye

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Definition of transmitted?

A

Light hits and passes through

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Definition of absorbed?

A

Light hits and stops

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Definition of reflected/scattered?

A

Light hits and bounces off

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

How do you see an object?

A

You see a bottle when the light bounces off the bottle and into your eye

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Definition of transparent?

A

Allow light through without scattering

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Definition of opaque?

A

Doesn’t allow any light through

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Definition of translucent?

A

Scatters light as it passed through

18
Q

Definition of reflective?

A

A material that light bounces off

19
Q

What is the normal?

A

A line at 90 degrees to a surface, drawn at the point where light hits the surface

20
Q

Angel of incidence is…….

A

20 degrees from the normal, the angle between the normal and where the light is coming from

21
Q

Angle of reflection is…….

A

The angle between the normal and the reflected ray

22
Q

What colours is yellow made of

A

FOOLED YA BRUV!!
Yellow is not made up of any other colours. That doesn’t seem right to be honest but that is what the science book bible says…..
ENLIGHTENMENT!

23
Q

The angle of reflection is …………….. to the angle of incidence

A

equal!!

24
Q

What is depth perception?

A

When you see something in water where it isn’t because your brain thinks light travels in a straight line. Your brain is right, but light still changes direction when it enters something else.
Science beat ya brain bruv!!

25
Q

Refraction is…….

A

When the angle of incidence is smaller than the critical angle.

26
Q

What colours can the sensors in our eyes detect?

A

Red Green Blue

27
Q

Red + Blue =

A

Magenta

28
Q

Blue + Green =

A

Cyan

29
Q

What happens if you shine yellow light through a prism?

A

The yellow light would stay the same and just refract

30
Q

Red + Green =

A

Yellow

31
Q

Mixing two types of light will always result in a

A

Brighter light!

32
Q

What is the order of the rainbow?

A

Red Orange Yellow Green Blue Indigo Violet

Richard of York gave battle in vain

33
Q

Red + Green + Blue =

A

WHITE

34
Q

White light is made of

A

all the colours in the spectrum :)

35
Q

What are the parts of your eye?

A

The cornea, the lens, the iris and the retina.

36
Q

What is a cornea?

A

A transparent window with a convex shape. this is how your eyes focus.

37
Q

What is a lens?

A

It changes shape behind the cornea to focus light from objects at varying distances

38
Q

What is an iris?

A

The coloured part of your eye that controls how much light enters it.

39
Q

What is a retina?

A

It is where images are formed (upside down). The cells in the retina are photo sensitive.

40
Q

Which 2 angles are the same

A

The angle of incidence and the angle of reflection. They are both 20 degrees

Science Yr 8 (14 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions