Question

Which one of the following is a f
not unit of length?
a)Angstrom
b) Parsec
c) Light year
d) leap year ​

Answer 1

Answer:

Angstrom is a unit of length that is used to measure very small distances. It is not the SI (International System) unit of length (the SI unit of length in meters).

Micron (also known as micrometer) is a unit of length that is used to measure small distances. It is also not the SI (international system) unit of length.

Parsecond (also known as parsec) is a unit of length that is used to measure very large distances like astronomical objects.

Steradian is not a unit of length, instead, it is a unit of measuring solid angle. A steradian can be defined as the solid angle subtended by a unit area of a sphere at the center of the sphere. A steradian to a sphere is what degree is to a circle.