Inch (in)
Definition: An inch (in) is an imperial unit of length equal to 1/12 of a foot or 2.54 centimeters. It is commonly used for measuring small distances and screen sizes.
History: The inch was originally based on the width of a human thumb. It was later standardized in the 14th century by King Edward II of England as three barleycorns placed end to end.
Current Use: Inches are widely used in the US, UK, and Canada for measuring screen sizes, furniture dimensions, and industrial tools. It remains a popular unit in carpentry, printing, and manufacturing.
Light Year (ly)
Definition: A light-year (ly) is the distance light travels in one Julian year (365.25 days), approximately 9.461 trillion kilometers or 5.878 trillion miles. It is used for measuring astronomical distances.
History: The term 'light-year' was first introduced in the 19th century to help astronomers express cosmic distances. It replaced astronomical units that were cumbersome for measuring vast space distances.
Current Use: Light-years are used in astronomy to describe distances between stars, galaxies, and other celestial objects. It is crucial for understanding the scale of the universe and cosmic events.
Quick Conversion Table Inch (in) to Light Year (ly)
1 Inch (in) equal to 2.68483946e-18 Light Year (ly)
5 Inch (in) equal to 1.34241973e-17 Light Year (ly)
10 Inch (in) equal to 2.68483946e-17 Light Year (ly)
20 Inch (in) equal to 5.36967893e-17 Light Year (ly)
30 Inch (in) equal to 8.05451839e-17 Light Year (ly)
50 Inch (in) equal to 1.34241973e-16 Light Year (ly)
75 Inch (in) equal to 2.01362960e-16 Light Year (ly)
100 Inch (in) equal to 2.68483946e-16 Light Year (ly)