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Course: Alhussan Physics — Stage 8
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Curriculum

Alhussan Physics — Stage 8

Chapter 6: Forces, Motion and Pressure

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Chapter 7: Light

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Chapter 8: Magnetism and Electromagnets

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Chapter 9: Energy Resources

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

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Quiz

7.6 The speed of light — Quiz

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  • Questions count: 10
  • Passing grade: B+
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1.
What is the speed of light in a vacuum?
300 000 km/s
340 m/s
300 km/s
3000 km/s
2.
Light travels 300000 km/s. The Moon is 384000 km away. How long does light take?
115200000000.0 s
1.3 s
0.8 s
84000.0 s
3.
Light takes 8 minutes from the Sun. How far is that? (300 000 km/s)
480 km
2,400,000 km
144,000,000 km
37,500 km
4.
True or false? Nothing travels faster than light.
True
False
5.
In 1021, Ibn al-Haytham argued that light takes ____ to travel.
mass
time
sound
colour
6.
Which term matches this definition? “The distance light travels in one year.”
Kilometre
Astronomical unit
Parsec only
Light-year
7.
True or false? Light travels instantly between two points.
True
False
8.
The bar chart shows how long light takes to reach Earth from objects. Which is furthest?
Dr Dabour Hub Academy - figure 1
Moon
Nearest star
Jupiter
Sun
9.
Why could early scientists not measure the speed of light?
Light did not exist
They had no eyes
There were no methods to measure very short times
Light is too slow
10.
Why do we see lightning before we hear thunder?
Sound is faster
Light travels much faster than sound
They travel together
Thunder comes first
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Part of Chapter 7: Light — see every lesson and quiz in this unit.
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