According to the present SI definition of the metre

PHYSICS · Single correct · A Level · Physics · Measurements and their errors · Measurements and their errors

Problem

According to the present SI definition of the metre, how much time (approximately) does light in vacuum take to travel a distance of exactly

1\,\text{m}

? (Take

c = 3.00\times10^{8}\,\text{m}\,\text{s}^{-1}

.) (a)

3.33\times10^{-10}\,\text{s}

(b)

3.33\times10^{-8}\,\text{s}

(c)

3.34\times10^{-9}\,\text{s}

(d)

2.99\times10^{-9}\,\text{s}