What is the SI base unit used to measure length or distance?

Explanation

The meter is the SI base unit used to measure length or distance, and it is currently defined with extreme precision based on the distance light travels in a vacuum during a specific, extremely small fraction of a second. This modern scientific definition, tied to the fundamental and unchanging speed of light, replaced earlier historical definitions of the meter based on physical reference objects, allowing for far greater precision and international consistency. Units like the kilometer and centimeter are simply defined as specific multiples or fractions of this base unit. Explore more Everyday Science MCQs on mcqstutor to keep practicing.