CAIE IGCSE Physics 6.2.2 Stars Topic Practice

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Question 1

[Maximum number: 1]

The nearest star to the Sun is about four light-years away from the Earth.
A student makes three statements about the star.
1 Light from the star takes about four years to reach the Earth.
2 Light from the Sun takes about four years to travel to the star and back to the Earth.
3 The star is outside our galaxy.
Which statements are correct?

A

1,2 and 3

B

1 and 3 only

C

1 only

D

2 and 3 only

Question 2

[Maximum number: 1]

What is the distance travelled by light in one year?

A

5.9×1015 m5.9 \times 10^{15} \mathrm{~m}

B

5.9×1015 km5.9 \times 10^{15} \mathrm{~km}

C

9.5×1015 m9.5 \times 10^{15} \mathrm{~m}

D

9.5×1015 km9.5 \times 10^{15} \mathrm{~km}

Question 3

[Maximum number: 1]

The galaxy Draco II is a distance of 6.6×1020 m6.6 \times 10^{20} \mathrm{~m} from Earth.
What is this distance in light-years?

A

1.4×1041.4 \times 10^{4} light-years

B

6.9×1046.9 \times 10^{4} light-years

C

1.4×1061.4 \times 10^{6} light-years

D

6.9×1066.9 \times 10^{6} light-years

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