Brainscape's Knowledge GenomeTM

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


See full index

Science Test Revision > Light, the Eye & the Camera > Flashcards

Light, the Eye & the Camera Flashcards

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

What is the retina?

A

A photosensitive material that contains cells that respond to light (photoreceptors)

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

What are the 2 types of photoreceptors?

A

Rods and Cones

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

Which 2 parts of the eye focus light onto the retina?

A

Cornea and lens

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

Rods are sensitive to…

A

movement and dim light

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

Cones are sensitive to…

A

Colors and bright light

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

What type of reaction happens when light hits the rods and cones?

A

Chemical reaction (which produce electrical impulses)

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

What part of they eye sends electrical signals to the brain?

A

Optic nerve

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

The iris is…

A

A muscle that controls the size of the pupil

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

What is a real image?

A

Any image you can make on a screen

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

What is the photosensitive grid at the back of a digital camera?

A

Pixels

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

A digital camera is called…

A

A charged-couple device (CCD)

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

Red, green, and blue are…

A

Primary colors

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

How many colors is white light made up from?

A

7

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

What do you use to split up white light into different colors?

A

A Prism

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

The spectrum of white light is…

A

Continuous

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

Dispersion happens because…

A

different colors of light are refracted different amounts.

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

Which color is refracted the most and has a high frequency?

A

Violet

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

Which color is refracted the least and has a low frequency?

A

Red

19
Q

Light with a _____ frequency is refracted more than light with a _____ frequency.

A

Higher, lower

20
Q

When you mix 2 primary colors together, you get…

A

Secondary colors

21
Q

To isolate 1 color of light, you need to…

A

Get rid of all the other colors

22
Q

What color do you see when white light reflects of a red car?

A

Red

23
Q

Why do you only see red when white light reflects off a red car?

A

The paint absorbs all the other colors except for red.

24
Q

_____ objects absorb of the colors of light and _____ objects reflect all the colors of light.

A

Black, white

25
Q

An object that emits light is…

A

A luminous object

26
Q

Objects that let light pass through completely are called…

A

Transparent

27
Q

Objects that let light pass through partially are called…

A

Translucent

28
Q

Objects that let no light pass through are called…

A

Opaque

29
Q

Why is there no light in very deep water?

A

The light is absorbed

30
Q

What is the difference between emit and transmit?

A

Emit means to give out while transmit means to let pass through.

31
Q

Opaque materials produce _____

A

Shadows

32
Q

Light travels in _____ _____

A

Straight lines

33
Q

Fill in the gaps- When you look at an apple, light ______ off the apple into your eye. The light enters your eye through the _____. The ______ and _____ focus the light onto your ______. The light forms a ________ image. A chemical reaction creates an __________ signal that is sent down you ________ ________ to your brain.

A
  1. Reflects
  2. Pupil
  3. Iris and lens
  4. Retina
  5. Real
  6. Electrical
  7. Optic nerve
34
Q

Light can travel through…

A

Gases, some solids, some liquids, and vacuums (like space)

35
Q

It takes light __ minutes to travel to Earth from the sun.

A

8

36
Q

What is the speed of light?

A

300,000 km/s

37
Q

How much slower is sound than light?

A

A million times

38
Q

What is refraction?

A

When light changes direction and speed through different mediums.

39
Q

What type of image is a mirror image?

A

Virtual image

40
Q

Define ‘plane mirror’

A

A completely flat and smooth mirror.

41
Q

What is the law of reflection?

A

Angle of incidence = Angle of reflection

42
Q

Reflection from a smooth surface is called…

A

Specular reflection

43
Q

Reflection from a rough surface is called…

A

Diffuse scattering

Science Test Revision (1 decks)

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