Question:
A light-year is the distance light travels in one year (at speed $= 2.998 \times 10^8 \textrm{ m/s}$).
- How many meters are there in 1.00 light-year?
- An astronomical unit (AU) is the average distance from the Sun to Earth, $1.50 \times 10^8 \textrm{ km}$. How many AU are there in 1.00 light-year?
Source: Giancoli, Douglas C., Physics: Principles with Applications, 7th Edition, 2014.
Quick Answer:
a) $9.46 \times 10^{15} \textrm{ m}$
b) $6.31 \times 10^4 \textrm{ AU}$
Giancoli 7th Edition, Chapter 1, Problem 19
(1:50)