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Which of the following is not unit of length?
- a)angstrom
- b)fermi
- c)barn
- d)parsec
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
Which of the following is not unit of length?a)angstromb)fermic)barnd)...
Angstrom, femi and parsec are the units of length whereas barn is the unit of nuclear cross-section.
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Community Answer
Which of the following is not unit of length?a)angstromb)fermic)barnd)...
Explanation:
What is a unit of length?
A unit of length is a standard measurement used to quantify distance or extent. It is used to measure the size or dimensions of objects or the distance between two points.
The options:
a) Angstrom: An angstrom is a unit of length equal to 10^-10 meters. It is commonly used to measure the size of atoms and molecules. It is a valid unit of length.
b) Fermi: A fermi is a unit of length equal to 10^-15 meters. It is used in nuclear physics to measure things on a subatomic scale. It is a valid unit of length.
c) Barn: A barn is a unit of area, not length. It is used to measure the cross-sectional area of atomic nuclei or the probability of a nuclear reaction occurring. It is not a valid unit of length.
d) Parsec: A parsec is a unit of length used in astronomy to measure astronomical distances. It is equal to about 3.09 × 10^16 meters. It is a valid unit of length.
Conclusion:
The correct answer is option 'C' because a barn is not a unit of length; it is a unit of area. The other options, angstrom, fermi, and parsec, are all valid units of length.
What is a unit of length?
A unit of length is a standard measurement used to quantify distance or extent. It is used to measure the size or dimensions of objects or the distance between two points.
The options:
a) Angstrom: An angstrom is a unit of length equal to 10^-10 meters. It is commonly used to measure the size of atoms and molecules. It is a valid unit of length.
b) Fermi: A fermi is a unit of length equal to 10^-15 meters. It is used in nuclear physics to measure things on a subatomic scale. It is a valid unit of length.
c) Barn: A barn is a unit of area, not length. It is used to measure the cross-sectional area of atomic nuclei or the probability of a nuclear reaction occurring. It is not a valid unit of length.
d) Parsec: A parsec is a unit of length used in astronomy to measure astronomical distances. It is equal to about 3.09 × 10^16 meters. It is a valid unit of length.
Conclusion:
The correct answer is option 'C' because a barn is not a unit of length; it is a unit of area. The other options, angstrom, fermi, and parsec, are all valid units of length.
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Which of the following is not unit of length?a)angstromb)fermic)barnd)parsecCorrect answer is option 'C'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Which of the following is not unit of length?a)angstromb)fermic)barnd)parsecCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following is not unit of length?a)angstromb)fermic)barnd)parsecCorrect answer is option 'C'. Can you explain this answer?.
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