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JEE Main202311 Apr 2023Morning ShiftPhysicsUnits and DimensionsActual

Given below are two statements : Statement I : Astronomical unit (Au), Parsec (Pc) and Light year (ly) are units for measuring astronomical distances. Statement II : Au < Parsec (Pc) < ly In the light of the above statements, choose the most appropriate answer from the options given below:

Options

  1. ABoth Statements I and Statements II are incorrect
  2. BStatements I is correct but Statements II is incorrect
  3. CBoth Statements I and Statements II are correct
  4. DStatements I is incorrect but Statements II is correct

Correct answer

B. Statements I is correct but Statements II is incorrect

Step-by-step solution

Astronomical unit denotes roughly the distance from Earth to the Sun. Parsec is a unit of length used to measure the large distances to astronomical objects outside the Solar System. A light-year is another large unit of length used to express astronomical distances. The relation between these units are as follows: 1 &#160;Parsec&#160; = 2 &#215; 10 5 &#160; Au 1 Au = 1 .58 &#215; 10 &#8722; 5 &#160; ly Thus, 1 Au &#60; &#160;ly&#160; &#60; &#160;Parsec&#160; . Hence, Statements I is true but Statements II is false

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