How long does it take light to travel $1.0 \mathrm {~m}$ ? $\left( c = 3.0 \times 10 ^ { 8 } \mathrm {~m} / \mathrm { s } \right)$
A) $3.3 \mathrm {~ns}$
B) $3.3 \mathrm {~s}$
C) $3.3 \mathrm {~ms}$
D) $3.3 \mu \mathrm { s }$

Question

Quizplus · Accepted Answer

The speed of light is $3.0 \times 10^8 \mathrm{~m/s}$. To find the time it takes light to travel $1.0 \mathrm{~m}$, use the formula $time = \frac{distance}{speed}$. Thus, $time = \frac{1.0 \mathrm{~m}}{3.0 \times 10^8 \mathrm{~m/s}} = 3.33 \times 10^{-9} \mathrm{~s}$, which is $3.3 \mathrm{~ns}$.

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How Long Does It Take Light to Travel $1.0 \mathrm {~m}$