Question

Which of the following is a unit of distance?
A.) Second
B.) Candela
C.) Mol
D.) Light year

Answer 1

Hint: In order to deal with this question first we will define the distance, then we will proceed further by explaining each of the given units in the option and further we will find the unit of distance amongst the given options.

Complete step by step answer:

Distance is an object's cumulative motion without considering direction. We may describe how much land an entity has reached beyond its point of departure or ending.
Option (A) second is the unit of time.
Option (B) candela is the SI unit of luminous intensity.
Option (C) mol or mole is the SI unit of measurement of specific substance.
Option (D) Light year is the unit of astronomical distance. It is equivalent to the distance that light travels in a year.
Hence, Light year is the unit of distance.
So, the correct answer is option D.

Additional information: The rotation of an object is determined from both distance and displacement. There can be no negative gap, and never reduces. Distance is either a scalar number, or a magnitude. Whereas displacement is both magnitude and direction of the vector quantity. It may be positive, negative or zero. Directed distance does not quantify rotation, it calculates the two-point difference, which may be a positive, neutral, or negative line.

Note: The light year is a measure of distance or length that is used to describe astronomical distances and very wide distances. The light year averages nearly 9.46 trillion kilometers or 5.88 trillion miles. As established by the International Astronomical Union, the distance that light travels in a vacuum in one Julian year is a light-year. We may also evaluate or quantify the light year value by calculating the luminance level in meters per second and the average time in one year in seconds.