Verified Solution • 2025–26 Session
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QJEEM23Phafe3: JEE Main 2023 Physics - Class 11 JEEM23Phafe3 Solution: Given below are two statements : Statements I : Astronomical…
Given below are two statements :
Statements I : Astronomical unit (Au), Parsec (Pc) and Light year (ly) are units for measuring astronomical distances.
Statements II :
In the light of the above statements, choose the most appropriate answer from the options given below:
Multiple Choice Options
- A Both Statements I and Statements II are incorrect.
- B Both Statements I and Statements II are correct,
- C Statements I is incorrect but Statements II is correct.
- D Statements I is correct but Statements II is incorrect.
Step-by-Step Verified Solution
Statement I is correct. Astronomical unit (AU), parsec (pc), and light year (ly) are indeed units for measuring astronomical distances.
However, Statement II is incorrect. The correct order of these units is:
1 AU is the average distance from the Earth to the Sun, which is about 93 million miles or 150 million kilometers.
1 light year is the distance that light travels in one year in a vacuum, which is approximately 9.461 trillion kilometers (5.878 trillion miles).
1 parsec is equal to about 3.26 light years, or approximately 30.9 trillion kilometers (19.2 trillion miles). Parsec (parallax of one arcsecond) is the distance at which an arc of length subtends an angle of one arcsecond .
So, the correct answer is Statement I is correct but Statement II is incorrect.
However, Statement II is incorrect. The correct order of these units is:
1 AU is the average distance from the Earth to the Sun, which is about 93 million miles or 150 million kilometers.
1 light year is the distance that light travels in one year in a vacuum, which is approximately 9.461 trillion kilometers (5.878 trillion miles).
1 parsec is equal to about 3.26 light years, or approximately 30.9 trillion kilometers (19.2 trillion miles). Parsec (parallax of one arcsecond) is the distance at which an arc of length subtends an angle of one arcsecond .
So, the correct answer is Statement I is correct but Statement II is incorrect.