Question

The nearest star is at a distance of 4 light years from the earth. Express this distance it
SI units?​

Answer 1

SI unit of distance is meter

1 light year =9,500,000,000,000,000 meters

=9.5*10¹⁵ meter

therefore 4 light years= 4* 1 light year

=3.8 *10¹⁶ meters