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DAS CCEA GCSE Physics 2 > P2.2 Lights > Flashcards

P2.2 Lights Flashcards

1
Q

What does the law of reflection state?

A

Angle of incidence is always equal to the angle of reflection

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2
Q

In a ray diagram, how is a normal represented?

A

Dashed lines

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3
Q

What angle describes the angle between the normal and the incident ray?

A

Angle of incident

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4
Q

What angle describes the angle between the normal and the reflected ray?

A

Angle of reflection

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5
Q

What are the properties of an image in a plane mirror? (4)

A

Virtual Image
Same size as the object
Laterally inverted
Same distance behind the mirror as the object is in front of the mirror

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6
Q

What is meant by the term “refraction” and what causes it?

A

It is the change of direction of a beam of light as it travels from one material to another.

Caused by the change in speed in different materials.

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7
Q

What angle describes the angle between the normal and the refracted ray?

A

Angle of refraction

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8
Q

What is the speed of light as it travels through air (or a vacuum)?

A

300 million m/s

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9
Q

What is the speed of light as it travels through water?

A

225 million m/s

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10
Q

What is the speed of light as it travels through glass?

A

200 million m/s

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11
Q

When light speeds up, will it bend away or towards the normal?

A

Bends AWAY from normal

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12
Q

When light slows down will it bend away or towards the normal?

A

Bends TOWARDS the normal

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13
Q

What colour refracts ,when passed through a glass prism, the least and why?

A

Red
Travels fastest in glass

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14
Q

What colour refracts ,when passed through a glass prism, the most and why?

A

Violet
Travels slowest in glass

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15
Q

What is meant by dispersion?

A

The splitting of white light into its component colours

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16
Q

What are lenses?

A

A specially shaped piece of glass or plastic

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17
Q

What are the 2 types of lenses?

A

Converging
Diverging

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18
Q

What is another name gave to a converging lens?

19
Q

What is another name gave to a diverging lens?

20
Q

What type of lens is one at which the lens is thickest at its centre and least thick at its edges?

A

Converging

21
Q

What type of lens is one in which the lens is thickest at its edges and least thick at its centre?

22
Q

What is the defining feature of a converging lens?

A

Rays of light parallel to the principal axis of a converging lens all converge at the principal focus on the opposite side of the lens

23
Q

What is the focal length?

A

The distance between the principal focus and the optical centre

24
Q

What is the principal focus?

A

A point on the principal axis of a convex lens through which rays of light parallel to the principal axis pass after refraction in the lens

25
Q

What is the principal axis?

A

A straight line joining the principal foci and passing through the optical centre of a convex lens

26
Q

List the 4 things an image in a concave lens will always be.

A

Erect
Virtual
Smaller than the object
Placed between the object and the lens

27
Q

In an object where the position is between lens and F, where would the location of the image be?

A

On same side of lens as object but further away from the lens

28
Q

In an object where the position is between lens and F, list the 3 properties.

A

Virtual
Erect
Larger

28
Q

In an object where the position is between lens and F, list the application.

A

Magnifying glass

29
Q

In an object at F, where would the image be?

30
Q

In an object at F, list its 3 properties of the image

A

Real
Inverted
Larger

31
Q

What is the application of an object at F?

A

Searchlight

32
Q

At an object between F and 2F, where would the image be?

33
Q

At an object between F and 2F, list the 3 properties of the image.

A

Real
Inverted
Larger

34
Q

At an object between F and 2F, what is its application?

A

Cinema Projector

35
Q

At an object at 2F, what is the location of the image?

36
Q

At an object at 2F, list thee 3 properties of the image.

A

Real
Inverted
Same size

37
Q

At an object at 2F, what would be its application?

A

Telescope-erecting lens

38
Q

At an object just beyond 2F, where would the image be?

A

Between F and 2F

39
Q

At an object just beyond 2F, list the 3 properties.

A

Real
Inverted
Smaller

40
Q

At an object just beyond 2F, what is the application?

41
Q

At an object which is very far from the lens, where would the image be?

42
Q

At an object which is very far from the lens, list the 3 properties.

A

Real
Inverted
Smaller

43
Q

At an object which is very far from the lens, what is the application?

DAS CCEA GCSE Physics 2 (6 decks)

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