If distance is speed time and light takes 8 minutes to travel from the Sun to Earth and over 4 hours to travel from the Sun to the planet Neptune, what is the distance from the Sun to Neptune?
a. 5 AU
b. 30 AU
c. 30 ly
d. 5 ly
e. 0.6 ly
Question 2
If distance is speed time and light takes 1.3 seconds to travel from the Moon to Earth and 8 minutes to travel from the Sun to Earth, which of the following statements is true?
a. The Sun is 6.2 times further from Earth than the Moon.
b. The Sun is 10 times further from Earth than the Moon.
c. The Sun is 0.16 times further Earth than the Moon
d. The Sun is 0.10 times further from Earth that the Moon.
e. The Sun is 370 times further from Earth than the Moon.
Changes in light quality with depth: (a) the rich colours on a shallow coral reef;
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