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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脳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脳108m/s

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

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

d=c脳t鈥︹赌︹赌︹赌︹赌�(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脳1011m3脳108m/s=500s1min60s=8.33min

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

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