Question

Fermi is a unit of
1. Energy
2. Momentum
3. Impulse
4. Length

Answer 1

Correct Answer - Option 4 : Length

• Fermi is the unit of length.
• 1 Fermi = 10 ^-15 meter
• The fermi is the unit basically used to measure distances in the nucleus. 
• If the distance between nucleons (neutron, proton) is less than 1 fermi, a strong nuclear force (much stronger than electrostatic force) acts on the surface. 
•  It has been named after Enrico Fermi who was an Italian physicist. He is known as the inventor of the first nuclear reactor. 

So, the correct option is Length.