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Chapter 24: Q17PE (page 888)

If the Sun suddenly turned off, we would not know it until its light stopped coming. How long would that be, given that the Sun is1.50×1011away?

Short Answer

Expert verified

The time taken is 500 s or 8.33 min .

Step by step solution

01

Define distance-time theory.

Distance-time theory defines distance as equivalent to a time period according to the equation D= ct.

02

Given information and Formula to be used

The speed of the light isc=3×108m/s

The distance between Sun and the earthd=1.50×1011m

The relation between distance and speed of light can be expressed as,

d=c×t……………(1)

03

How long does it take light to stop coming if Sun suddenly turned off, given that the Sun is 1.50×1011m away?

Rearrange the equation (1) for t and substitute the given data, such that,

t=1.50×1011m3×108m/s=500s1min60s=8.33min

Therefore, the time taken is 500 s or 8.33 min.

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