Question

9
a
Q.1.Distance travelled by light in one
year in vacuum defines *
O (a) light year
O (b) parsec
O (c) astronomical unit
O (d) angstrom
va​

Answer 1

Answer:

light year defines that the light has traveled in one year

Answer 2

Answer:

c)Astronomical Union

Explanation:

Astronomical Union (IAU), a light-year is the distance that light travels in vacuum in one Julian year (365.25 days).