# Which of the following is the smallest unit of measurement?

## Question: Which of the following is the smallest unit of measurement?

## a) Millimeter b) Angstorm c) Fermi d) Meter

Millimeter, angstorm, Fermi and meter are different measuring units used to measure the length, height, distance, etc.

## Answer: Option C - Fermi is the smallest unit of measurement.

Let's express each of these units in terms of meter to compare them.

## Explanation:

We know that,

Meter is the SI unit of length

1 millimeter = 1/10^{3} meter

1 angstorm = 1/10^{10} meter

1 fermi = 1/10^{15} meter

From the above relationships, it is clear that fermi will have the least value.

### Hence, the smallest unit of measurement is Fermi.

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