Q.1.Distance travelled by light in one year in vacuum defines *
(a) light year
(b) parsec
(c) astronomical unit
(d) angstrom
Answers
Answer:
a) light year...........
Answer:
Light Year
Explanation:
The distance travelled by light in one year in vacuum is known as a light year. It is a unit of measurement used to express astronomical distances and is equal to approximately 9.461 x 10^12 kilometers or 5.878 x 10^12 miles.
A parsec is another unit of measurement used to express astronomical distances and is equivalent to 3.085678 x 10^16 meters or 3.261633 ly.
An astronomical unit (AU) is a unit of measurement used to express distances within our solar system and is equal to the average distance between the Earth and the Sun, which is about 149.6 million kilometers.
Angstrom, on the other hand, is a unit of measurement used to express extremely small distances, such as those found in atomic and molecular structures. It is equal to 10^-10 meters.
The above answer tells all value terms that how we use particular for particular purpose.
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