Physics One light year is equal to________________? Options:A. 9.5x1015mB. 9.5x1015secC. 9.5x1015KmD. 9.5x1015cmView AnswerA. 9.5x1015m Continue Reading Previous: A digit zero in a measurement__________________?Next: The number of significant figures in the length of a bar 6200mm measured by meter rod is_______________?