ray model of light Flashcards

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

how does light travel

A

-in a straight line
-cannot bend

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

what is a luminous object

A

Objects that are able to emit light on their own

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

what is a non-luminous object

A

-Objects that do not emit light on their own
-Reflect light into our own eyes.
-Can only be seen in the presence of light source

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

what is the incident ray

A

the light ray hitting the
reflecting surface

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

what is the reflected ray

A

the Light ray travelling away from the reflecting surface after bouncing off the surface

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

what is the angle of incidence

A

Angle between the incident ray and the normal

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

what is the angle of reflection

A

Angle between the reflected ray and the normal

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

what is a plane mirror and what properties does it have

A

a smooth and flat reflecting surface
-Same size as the object
-upright
-laterally inverted
-Virtual(not real)
-Same distance from the mirror as object

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

what are some uses of plane mirrors

A

Check our appearance
-Line walls in a building to make interior
-Periscopes
-Reflect the eye chart

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

what is a convex mirror

A

a mirror that curves outwards

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

what are the properties of a convex mirror

A

-Virtual
-Upright
-Smaller than the object
-Provides a wide field of vision :
used when large area needs to be seen

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

what are some uses of a convex mirror

A

-At road junctions to allow drivers to see around blind corners
-At corners of shops to allow shopkeepers to see large area of shop
-Rear-view mirrors/ side mirrors, allow driver to see large area of traffic

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

what is a concave mirror

A

a mirror that curves inwards

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

what are the properties of a concave mirror

A

-Virtual
-Upright
-Larger than the object (magnified)
-Used when a magnified image is needed

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

what are some uses of a concave mirror

A
  • Dentist: to form magnified image of teeth
  • Headlights of car: reflect light from bulbs in headlights to form strong beams of light
  • vanity:Allow us to shave or apply make-up easily
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

what is refraction

A

Refraction is bending of light at the boundary between two different transparent materials due to change in speed of light as it passes from one material into the other.

17
Q

light will travel….in optically denser objects and will bend towards or away from normal

A

slower
towards normal

18
Q

Light travels….in optically less dense objects and will bend towards of away from normal

A

faster
away from normal

19
Q

in the rainbow, which colour bends the most and which colour bends the least

A

red bends the least
violet bends the most

20
Q

how does a rainbow form

A

When white light passes through a glass prism, the prism refracts light of different colours by different angles due to difference in speed of individual colours.