Question

The Value of the Universal Gravitational Constant (G) was first of all experimentally determined by which physicist?
1. Robert Adler
2. Franz Aepinus
3. Henry Cavendish
4. Neil Ashby

Answer 1

Correct Answer - Option 3 : Henry Cavendish

The correct answer is Henry Cavendish.

• The gravitational constant also known as the universal gravitational constant, denoted by the letter G, is an empirical physical constant involved in the calculation of gravitational effects.

• In Newton's law, it is the proportionality constant connecting the gravitational force between two bodies with the product of their masses and the inverse square of their distance.
• In SI units, the value of G is approximately 6.674×10⁻¹¹ m³kg⁻¹s⁻².
• Henry Cavendish was an English natural philosopher, scientist, and an important experimental physicist. 
• He determined the value of the Universal Gravitational Constant by using an extremely sensitive torsion balance in 1798.