Question

If the unit of length be doubled then the numerical value of the speed of light in vacuum will become (with respect to present value) –

• A. Double
• B. Half
• C. Remain same
• D. Answer depend on system of unit

Answer 1

Answer: (B)

Half

Answer 2

$\mathbf{\lbrack}\mathbf{V}\mathbf{\rbrack}\mathbf{\ }\mathbf{=}\text{ L}\text{T}^{\mathbf{1}}$

∴ Unit of speed α unit of length