5 Questions
What is the average distance between Earth and Sun known as?
Astronomical Unit (AU)
What is the distance travelled by light in vacuum in one year known as?
Light year (ly)
What is the unit of length in the SI system?
Metre (m)
What is the distance at which an arc of length 1 AU subtends an angle of 1 second known as?
Parsec
Which unit is equal to 10^-10 meters?
Angstrom (A)
Study Notes
Astronomy and Units
- The average distance between Earth and Sun is known as an astronomical unit (AU).
- The distance travelled by light in vacuum in one year is known as a light-year.
- The unit of length in the SI system is meters.
- The distance at which an arc of length 1 AU subtends an angle of 1 second is known as a parsec.
- The unit equal to 10^-10 meters is an angstrom (Å).
Measurement of Length Quiz: Test your knowledge of direct methods for measuring length, including the use of a metre scale. Explore the challenges of measuring large distances, such as the distance of planets or stars, and very small sizes like molecules. Prepare to expand your understanding of length measurement in the SI system.
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