A new unit of length is chosen such that the speed of light in vaccum

1.	A new unit of length is chosen such that the speed of light in vaccum is unity. What is the distance between the sun and the earth in terms of the new unit if light takes 8 min and 20 s to cover this distance.
Answer» Speed of light in vacuum, c = 1 new unit of length s^-1 t = 8 min. 20 sec, = 500 s x = ct= 1 new unit of length s^-1 × 500s x = 500 new unit of length

A new unit of length is chosen such that the speed of light in vaccum is unity. What is the distance between the sun and the earth in terms of the new unit if light takes 8 min and 20 s to cover this distance.

Answer»

Speed of light in vacuum, c = 1 new unit of length s^-1

t = 8 min. 20 sec, = 500 s

x = ct= 1 new unit of length s^-1 × 500s

x = 500 new unit of length