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Science Unit Exams > Science8 Unit 2 Optics And Vision > Flashcards

Science8 Unit 2 Optics And Vision Flashcards

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1
Q

Transparent

A

Allow light to pass through

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2
Q

Opaque

A

Don’t let light pass through

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3
Q

Reflection

A

Light changes direction

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4
Q

Umbra

A

Full shaded region of a shadow

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5
Q

Penumbra

A

Partly shaded region

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6
Q

Speculation reflection

A

Reflects off smooth surfaces

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7
Q

Diffuse reflection

A

Rough surfaces

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8
Q

Real image

A

Light passes through the image location

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9
Q

Virtual image

A

Light doesn’t pass through at all ie) painting

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10
Q

Incidence

A

Side where light comes in on a angle

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11
Q

Refraction

A

Light passing through one substance to another

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12
Q

Concave mirror

A

Focus light ray

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13
Q

Convex mirror

A

Reflects from several parts

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14
Q

Visible light spectrum

A

When you see every colour (ROYGBV)

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15
Q

Electromagnetic radiation

A

All forms of radiant energy

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16
Q

Wavelength

A

Distance between the top ray and bottom

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17
Q

Ray

A

Straight line that represents the light

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18
Q

Property light

A

Have crests and trouts

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19
Q

Illuminate

A

Objects that don’t reflect light ie) moon

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20
Q

Lens for a eye

A

Focus light to back of eye to see image

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21
Q

Retina

A

Sends message to brain

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22
Q

Aperture

A

Hole in camera that lets light in

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23
Q

Diaphragm

A

Changes size of the aperture to allow proper amount of light in

24
Q

Pupil

A

Let’s light in eye

25
Q

CCD matrix

A

Contains photosynthesis elements

26
Q

Iris

A

Controls size of pupil and surrounded by muscles

27
Q

Myopia

A

Near sightedness

28
Q

Hyperopia

A

Far sighted

29
Q

Addition model of Color

A

Primary colours combine together you see different colours

30
Q

Subtraction model of Color

A

Primary colours absorb the other two primary colours ie) apple it turns others red

31
Q

Amplitude

A

Height of wave

32
Q

Frequency

A

Number of times a wave cycle or vibration is given

33
Q

Bioluminescent

A

Producing light due to naturally occurring chemical reaction

34
Q

Chemiluminescene

A

Producing light due to a occurring chemical reaction

35
Q

Phosphorescent

A

Absorbing and storing energy

36
Q

OLED

A

Organic light emitting diodes

37
Q

Electroluminescent

A

Technologies that are application

38
Q

CFL

A

Compact fluorescent light

39
Q

LCD

A

Liquid crystal displays

40
Q

Ray diagram

A

Illustrates the direction of the path of light

41
Q

Shadow

A

The light being blocked from an object

42
Q

Law of reflection

A

Angle of incidence equals angle of reflection

43
Q

Law of refraction

A

Angle of incidence equals angle of refraction

44
Q

Focal point

A

View where lines are parallel

45
Q

Primary colours of light

A

Red green blue

46
Q

Secondary colours of light

A

Magenta cyan and yellow

47
Q

Cones

A

React to light

48
Q

Rods

A

Send message to your brain

49
Q

How is shadow created

A

Whenever light hits an opaque object

50
Q

2 parts of a shadow

A

Fully shaded region umbra
Partly shaded region penumbra

51
Q

3 types of material light can hit

A

Transparent
Translucent
Opaque

52
Q

How is luminance affected by light

A

The farther away it is, the more it fades

53
Q

Different colours of visable light spectrum

A

White light is presence of all visable light
Black is absence of all visible light

54
Q

How is rainbow created

A

Sunlight changes direction as it enters single raindrops

55
Q

Aunty parts of wavelength

A

Length
Amplitude
Frequency

56
Q

What is the order of waves

A

Low radio waves
Microwave
Infared
Ultra violet
X rays
Highest gamma waves

57
Q

3 artificial lights

A

Glow sticks
Led bulbs
Glow in dark plastic shapes

Science Unit Exams (1 decks)

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