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HIA International — Grade 7

Unit 1: Breathing and respiration

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Unit 2: Dissolving, solubility and chromatography

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Unit 3: Forces, motion and pressure

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Unit 4: Ecosystems

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Unit 5: Atoms, purity and climate

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Unit 6: Light and objects in space

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Unit 7: Nutrition, health and movement

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Unit 8: Energy changes and reactions of metals

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Unit 9: Magnetism and electromagnets

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Quiz

6.2 Refraction

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Refraction Checkpoint Physics quiz: free practice for Cambridge Checkpoint Physics 0893. Work through this Refraction Checkpoint Physics quiz and get instant feedback on every answer. If you get stuck, review the 3.2 Refraction lesson. More practice: Cambridge Checkpoint Physics 0893 — all units. Syllabus: Cambridge Lower Secondary programme.

  • Questions count: 46
  • Passing grade: B+
  • Time limit:
Start Quiz
1.
Which statement correctly describes transparent?
the material that light passes through, such as air, glass or water
letting light through so you can see through it
changed to be less clear, as a background seen through a glass of water
the ray after it has changed direction on entering the new medium
2.
Which statement correctly describes speed of light in air?
the ray after it has changed direction on entering the new medium
the material that light passes through, such as air, glass or water
the change in direction of light passing from one medium to another because of a change in speed
300000 kilometres per second
3.
A straw looks bent in water because of:
Dispersion
Refraction
Reflection
Absorption
4.
A ray of light passes through a rectangular glass block surrounded by air. Which line, P, Q, R or S, shows the path of the ray after it leaves the block?
Dr Dabour Hub Academy - figure 1
The line labelled R
The line labelled P
The line labelled Q
The line labelled S
5.
Aroha measured how a ray bends as it goes from air into glass. Use her graph. When the angle of incidence is 60°, by how many degrees does the ray change direction as it enters the glass?
Dr Dabour Hub Academy - figure 2
35 degrees
25 degrees
60 degrees
95 degrees
6.
Light from a coin at the bottom of a pool travels to Liam's eye as shown. His brain assumes light travels in straight lines. Where does the coin appear to be?
Dr Dabour Hub Academy - figure 3
At point Q
At point R
At point P
Exactly where the coin is
7.
The diagram shows a wide beam of light passing at an angle from air into water. Which statement explains why the beam changes direction at the surface?
Dr Dabour Hub Academy - figure 4
Edge 2 enters the water first and speeds up before edge 1 does
Both edges slow down at the same moment, which turns the beam
Edge 1 is reflected by the surface while edge 2 carries straight on
Edge 1 enters the water first and slows down before edge 2 does
8.
Sipho holds a magnifying lens in sunlight so the light comes to a bright spot on a piece of paper, as shown. Why do the rays meet at one point?
Dr Dabour Hub Academy - figure 5
The curved glass refracts each ray so it bends towards the middle
The curved front surface reflects all the rays back to one point
The rays speed up inside the glass and bend away from the middle
Only the ray through the centre bends and the rest go straight on
9.
Kemi drew this ray diagram for light passing out of a glass block into air. Her teacher says it is wrong. What is the mistake?
Dr Dabour Hub Academy - figure 6
The ray should not bend at all because it is leaving the glass
The ray should bend away from the normal as it speeds up in air
The ray should be reflected back into the glass at the boundary
The normal should be drawn along the surface of the glass block
10.
Imani placed a pin at different depths in a tall tank of water and measured how deep it appeared when looking down from above. Use her graph. How deep does a pin placed 25 cm under the water appear to be?
Dr Dabour Hub Academy - figure 7
About 25 cm
About 33 cm
About 19 cm
About 6 cm
11.
The table describes four rays of light meeting a boundary between two materials. Which ray changes speed at the boundary but does not change direction?
Ray A only
Rays B and D
None of the rays
Ray C only
12.
In an aquarium, a ray of light passes at an angle from the water into the glass wall of the tank. Use the table to decide what happens to the ray as it enters the glass.
It slows down and bends towards the normal
It speeds up and bends away from the normal
It slows down and bends away from the normal
It keeps the same speed, so it does not bend
13.
Lina filled in this table of predictions before her lesson. Which row contains a mistake?
Row 1 (air into glass)
Row 3 (water into air)
Row 2 (glass into air)
Row 4 (along the normal)
14.
Chen shone a ray at 45° into glass blocks of different thickness and measured how far sideways the ray was shifted when it came out. What do his results show?
Thicker blocks bend the emerging ray further away from parallel
The sideways shift stays the same whatever the thickness
Thicker blocks shift the ray further, but it still leaves parallel
Thinner blocks shift the ray more because the light slows less
15.
Dev aimed rays through the curved side of a semicircular glass block so they only bent where they left the flat side. Which conclusion do his results support?
Leaving glass, light bends towards the normal because it slows in air
The angle in air is always exactly double the angle inside the glass
The ray leaves the glass without changing direction at any angle
Leaving glass, light bends away from the normal, more so at larger angles
16.
Yara has the steps of a refraction experiment muddled up in the table. Which order is correct?
2, 4, 1, 5, 3
5, 4, 2, 3, 1
2, 1, 4, 5, 3
2, 4, 3, 1, 5
17.
Ruth shone a ray at 40° into three clear liquids in a thin plastic box. In which liquid does light travel most slowly?
Tap water
Cooking oil
Sugar solution
All at the same speed
18.
Why does light change direction when it passes at an angle from air into glass?
The glass is much thicker than air
Glass reflects part of the ray sideways
Light is pulled towards heavy materials
Its speed changes at the boundary
19.
Maria says a ray of light keeps bending all the way through a glass block. Which statement is correct?
It bends more and more as it goes deeper into the glass
It bends only at the surfaces; inside, it goes straight
It bends only in the middle of the glass, not at the surfaces
It curves in an arc until it reaches the far surface
20.
A ray passes from air into a glass block with an angle of incidence of 55°. Which of these could be the angle of refraction?
55 degrees
70 degrees
33 degrees
0 degrees
21.
Each option pairs a change of medium with what happens to a ray arriving at an angle. Which pairing is correct?
Air into glass – slows down, bends towards normal
Glass into air – slows down, bends towards normal
Air into water – speeds up, bends away from normal
Water into air – slows down and does not bend
22.
Each option pairs a term with its meaning. Which pairing is correct?
Medium – a line drawn at 90° to the surface
Angle of incidence – between incoming ray and normal
Lens – a flat mirror that reflects the light
Angle of refraction – between ray and the surface
23.
Each option pairs an everyday observation with its cause. Which pairing is correct?
Pool looks shallow – light bends towards normal leaving water
Mirror image – light refracts as it passes into the mirror
Pool looks shallow – light bends away from normal leaving water
Lens focuses sunlight – light reflects off the curved glass
24.
Each option pairs apparatus from the glass block experiment with its job. Which pairing is correct?
Ray box – measures the angle of refraction
Glass block – turns the ray into two normals
Pencil crosses – make the ray bend even more
Protractor – measures angles from the normal
25.
Light slows down when it passes from air into:
Air
Glass
Space
A vacuum
26.
Which term is described as: letting light through so you can see through it?
distorted
refraction
transparent
refracted ray
27.
Which term is described as: the ray after it has changed direction on entering the new medium?
distorted
refracted ray
transparent
refraction
28.
Match the term to its correct meaning: refracted ray
letting light through so you can see through it
the ray after it has changed direction on entering the new medium
changed to be less clear, as a background seen through a glass of water
the angle between the refracted ray and the normal
29.
Diamond slows light down much more than glass does. A ray entering diamond from air at 40° will bend _____ than a ray entering glass from air at 40°.
more towards the normal
less towards the normal
more away from the normal
no more and no less
30.
A material that slows light down more than another is said to have a greater _____.
transparency
optical density
temperature
reflectivity
31.
To draw the normal, Yusuf uses a protractor to draw a line at _____ to the edge of the block where the ray enters.
45 degrees
180 degrees
90 degrees
the same angle as the ray
32.
Because of refraction, the water in a swimming pool looks _____ than it really is.
much deeper
much wider
more narrow
shallower
33.
The speed of light in air is 300 kilometres per second. - True or false?
True
False
34.
Refraction is the change in direction of light passing from one medium to another. - True or false?
True
False
35.
Air, glass and water are each a medium for light. - True or false?
True
False
36.
When light passes at an angle from glass into air, it speeds up and bends away from the normal. True or false?
True – the statement is correct
False – it slows down and bends towards it
False – it keeps going in a straight line
True, but only for red light
37.
Light bends when it enters water because water is heavier than air. True or false?
True – the statement is correct
False – it bends because its speed changes
True, because heavy materials pull light
True, but only in deep water
38.
A ray that enters a glass block along the normal slows down but does not change direction. True or false?
False – it does not slow down at all
False – it bends towards the normal
True – the statement is correct
False – it is reflected straight back
39.
A ray that passes through a rectangular glass block comes out parallel to the ray that went in. True or false?
False – it leaves at a bigger angle
False – it leaves along the normal
False – it cannot leave the block
True – but it is shifted sideways
40.
The angle of refraction is measured between the refracted ray and the surface of the glass block. True or false?
False – it is measured from the normal
True – the statement is correct
True, but only for a thick block
True, if the ray is bent a lot
41.
If light travelled at exactly the same speed in glass as in air, a ray would pass into glass without changing direction. True or false?
False – the glass would still bend it
True – the statement is correct
False – it would be reflected instead
True, but only along the normal
42.
Light travels fastest in glass, more slowly in water and slowest in air. True or false?
True – the statement is correct
True, but only for white light
False – it is fastest in air
True, as denser means faster
43.
A pool looks shallower than it is because light from the bottom bends towards the normal as it passes out of the water. True or false?
True – the statement is correct
True, because light slows down in air
True, but only when the water is warm
False – it bends away from the normal
44.
In the glass block experiment, the path of the ray inside the block is drawn by removing the block and joining the point where the ray entered to the point where it left. True or false?
True – the statement is correct
False – the path inside cannot be drawn
False – it is always drawn along the normal
True, but only for a ray along the normal
45.
A magnifying lens brings light to a focus by reflecting it from its curved surfaces. True or false?
True – the statement is correct
False – the lens refracts the light
True, but only in bright sunlight
True, because the glass is shiny
46.
When the angle of incidence for light entering glass from air goes up from 20° to 40°, the angle of refraction also goes up but stays smaller than the angle of incidence. True or false?
False – the angle of refraction goes down
False – it becomes larger than 40°
False – it stays the same at all angles
True – the statement is correct
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Part of Unit 6: Light and objects in space — see every lesson and quiz in this unit.
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