Question

Which of the following is not the unit of distance? *

A) Light year

(B) Astronomical Unit

(C) Parsec

(D) Millisecond

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Answer 1

Answer:

Millisecond

( D )  is the answer

Answer 2

Answer:

Millisecond is not the unit of distance.

Explanation:

In the CGS system, a centimeter is the unit of measurement.

Distance is the physical measurement of how far an object has moved in physics.

A scalar quantity is distance.

Explanation for correct option:

A millisecond is a unit of measurement for time.

$ms$ is the symbol for millisecond.

A millisecond's base unit is second, and its prefix is milli.

The prefix milli is derived from the Latin mile, which means thousand, and is represented by the letter m

Explanation for Incorrect option:

(a) A light-year is a unit of measurement for distance. In one Julian year, a light photon travels the distance of a light photon in the vacuum. The value of one light-year, denoted by $ly$, is constant. In astronomy, the word "light-year" is frequently used to describe the distance between two celestial objects.

Light travels at a speed of around $300,000$ kilometers per second. In a year, it can traverse approximately $10$trillion kilometers.

(b) The astronomical unit is essential in defining and comprehending the distance between star objects, as well as in astronomical problem calculations and computations. The distance between two astronomical units is$92955807$miles.

(c) a unit of measure for interstellar space equal to $3.26$ light-years that represents the distance between two places separated by one astronomical unit and an object with a parallax of 1 second.