Brainscape's Knowledge GenomeTM

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


See full index

Science > Optics > Flashcards

Optics Flashcards

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

How do you see colours

A

White light hits an object, all the colours are absorbed except Defoe the colour you see it reflects

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

How does light travel

A

Straight line

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

What is light

A

Form of energy that can be detected by the human eye.

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

What is visible light

A

A mixture of all the colours of the rainbow

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

What do colours have different amounts of

A

Energy

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

How can light be understood

A

Using wave model

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

Who was the first person to measure speed of light. What is it

A

Albert Michelson.

1000000000 km/h

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

What does light and sound travel in

A

Waves

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

What is lightning

A

Burst of electrons come out of a cloud

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

How do you calculate how far away lighting is

A

Multiply seconds between strikes in a row by speed of the sound

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

How long does light take to reach us from space

A

Thousands of years. Sometimes by the time we see it it’s already dead

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

What are some technology we use that use light

A

Microscope, telescope, periscope,binoculars, fibre optics, camera

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

What colours does white light contain

A

All

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

What on the skin of a fruit reflects colours

A

Chemicals

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

What are lasers

A

Beams of very intense light

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

Why are there colours in soap bubbles

A

Colour waves bumping into each other

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

Why is the sky blue

A

Air particles scatter the sun light, there are more blue ones so we see blue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What are the differences with white and black

A

White: reflect all colours
Black: absorb all colours

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What sort of waves and frequency does red light have

A

Long slow waves, low frequency, low energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What sort of waves and frequency does blue light have

A

Short fast waves, high frequency, high energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

How many colours are lasers

A

Only one colour so you can’t break it

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

What happens when a laser is shown through a prism

A

It refracts but does not disperse

23
Q

What do wave models explain

A

That light is a type of wave that travels through empty space, and transfers energy from one place to another.

24
Q

What are the parts of a wave called

A

Peak, troph, wavelength

25
Q

What is frequency

A

The number of repetitive motions that pass a point,

26
Q

What happens with the larger the amplitude

A

Greater energy

27
Q

What is a wave length

A

Distance from peak to peak or trouph to trouph

28
Q

What do longer wavelengths do

A

They refract the least

29
Q

What do short wavelengths mean

A

High frequency

30
Q

What do high wave lengths mean

A

Low frequency

31
Q

What are the properties of visible light

A 
Light travels in a straight line
Light reflects
Light refracts
Light disperses 
Light travels through a vacuum 
Light travels through objects to different degrees
32
Q

What is refracting

A

When light travels through a substance and bends then continues in a straight line

33
Q

What is visible light spectrum

A

Can be seen due to dispersion of light through a prism

34
Q

What are the constituent colours of white light

A

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

35
Q

What colour has smallest refraction

A

Red

36
Q

What colour has the largest refraction

A

Violet

37
Q

Types of electro magnetic radiation

A 
Radio waves 
Microwaves
Infrared 
Ultra violet 
X rays 
Gamma rays
38
Q

Radio waves

A

Lowest energy and frequency
Pros improved tele communication
Cons uncertain of long term affects

39
Q

Microwave

A

Highest frequency for radio waves

40
Q

Infrared

A

Lower energy and frequency

41
Q

Ultra violet

A

High frequency and energy
Pros treats jaundice in babies
Cons skin cancer

42
Q

X Rays

A

Higher frequency than UV
Pros medical detection
Cons over exposed can cause cancer

43
Q

Gamma rays

A

Have highest frequency and shortest wave length

44
Q

What can happen when light hits something

A

Can be reflected bent or absorbed

45
Q

What lights control tvs

A

Infrared

46
Q

What does the way light is curved affect

A

How it bends

47
Q

What angle does light reflect

A

The angle it was hit with

48
Q

Concave

A

Image will be upside down

Will diverge light

49
Q

Convex

A

Magnifying

Focusing

50
Q

What happens when light is absorbed

A

Turns to heat

51
Q

What are the 2 cells in the retina

A

Cones : colour

Rods: black / night

52
Q

What are the 3 different visibility rates

A

Opaque can’t see through
Translucent cloudy
Transparent clear

53
Q

Virtual image

A

When you can focus on something on a concave lens but not on a screen.

54
Q

How do eyes see stuff

A

Light reflects of of an object into our eyes, through the lens where it turns upside down, then to the retina where it turns right side up, then to the optic nerve to the brain

Science (17 decks)

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