Curriculum
Course: Alhussan Physics — Stage 8
Login

Curriculum

Alhussan Physics — Stage 8

Chapter 6: Forces, Motion and Pressure

0/48

Chapter 7: Light

0/30

Chapter 8: Magnetism and Electromagnets

0/15

Chapter 9: Energy Resources

0/18

Chapter 10: The Earth in Space (Galaxies and Asteroids)

0/10
Quiz

7.4 Refraction: air and water — Quiz

Submit quiz
Once you submit, you will no longer be able to change your answers. Are you sure you want to submit the quiz?
Cancel Submit
  • Questions count: 10
  • Passing grade: B+
Start Quiz
1.
Which term matches this definition? “The change in direction of light as it passes from one medium to another.”
Reflection
Refraction
Dispersion
Absorption
2.
Going from air into water, light bends:
Back on itself
Not at all
Away from the normal
Towards the normal
3.
Why does refraction happen?
Water is magnetic
Light stops
Light changes colour
Light changes speed
4.
Light travels at 300 million km/s in air and 230 million km/s in water. By what percentage does it slow down?
30%
70%
77%
23%
5.
Why does a straw in water look bent?
Dr Dabour Hub Academy - figure 1
Light reflects off the straw
The straw really bends
Light refracts as it leaves the water
Water absorbs the straw
6.
The marching-row model explains refraction because:
Each person slows on sand, turning the row
People speed up on sand
Sand reflects people
Rows never turn
7.
Water to air, light bends:
Away from the normal
Not at all
Into a circle
Towards the normal
8.
Light travels at about 230 million km/s in ____.
water
air
a vacuum
glass only
9.
True or false? A ray along the normal does not change direction.
True
False
10.
True or false? Light speeds up when it goes from air into water.
True
False
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
Part of Chapter 7: Light — see every lesson and quiz in this unit.
Accepted payment methods