Question

Name some physical quantities which are dimensionless

Answer 1

Some physical quantities which are dimensionless are

1. Angular displacement
2. Solid angle
3. Atomic mass
4. Relative refractive index

Dimensionless quantities:- Physical quantities which do not have dimensions but have variable values .These types of physical quantities are called as dimensionless quantities.

Angular displacement:-

• Angular displacement is an example of dimensionless quantity which have units but no dimensions.

• The unit of angular displacement is Radian.

Solid angle

• Solid angle is an example of dimensionless quantity which have units but no dimensions.

• The unit of Solid angle is Steradian.

Atomic mass

• Atomic mass is a example of dimensionless quantity which have units but no dimensions.

• The unit of Solid angle is AMU.

Answer 2

Answer:

The physical quantities which are dimensionless are angular displacement, solid angle, atomic mass.

Explanation:

• The quantity of dimension with one is also known as the dimensionless quantity since it is a quantity that is not tied to any physical dimension.
• It is a one-dimensional pure number.
• Mathematicians and physicists frequently employ these dimensionless quantities.
• These numbers are calculated as products or ratios of numbers.