Physics, asked by seemamahto774, 4 months ago

define light year, Astronomical unit and passec.

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Answered by Guru181

1

Answer:

Lightyear: It is defined as a distance travelled by light in a vacuum in one year. 1 light year = 9.46 x 1015 m. One astronomical unit: It is a mean distance between the sun and the earth. ... 1 parsec: It is the distance at which an arc of length one astronomical unit subtends an angle of 1 second of an arc

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