Question

A light-year is the distance light travels in one year (at speed = 2.998 x 10^8 m/s ). a) How many meters are there in 1.00 light-year? b) An astronomical unit (AU) is the average distance from the Sun to Earth, 1.50 x 10^8 km . How many AU are there in 1.00 light-year?

Accepted Answer

a) 9.46 x 10^{15} m  b) 6.31 x 10^4 AU

A light-year is the distance light travels in one year (at speed $= 2.998 \times 10^8 \textrm{ m/s}$ ).

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A light-year is the distance light travels in one year (at speed =2.998×108 m/s= 2.998 \times 10^8 \textrm{ m/s}=2.998×108 m/s).

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A light-year is the distance light travels in one year (at speed $= 2.998 \times 10^8 \textrm{ m/s}$ ).