Question

1 fermi is equal to

• A. ${10}^{-15}$m
• B. ${10}^{15}$m
• C. ${10}^{-12}$m
• D. ${10}^{12}$m

Answer 1

The correct option is A

${10}^{-15}$m

Explanation for the correct option:

(A) ${10}^{-15}m$

1. A fermi is equivalent to a femtometer.
2. It is named in the honor of Italian physicist Enrico Fermi.
3. It is a unit of length where 1 fermi is equal to ${10}^{-15}$ meter.

Explanation for the incorrect option(s):

(B) ${10}^{15}m$

It is used for the prefix ‘peta’ and denoted by the symbol ‘P’.

(C)${10}^{-12}m$

It is used for the prefix ‘pico’ denoted by the symbol 'p'

(D) ${10}^{12}m$

It is used for the prefix ‘tera’ denoted by the symbol ‘T’.

Hence, the correct option is (A).