Question

1. Write down the working formula to determine of the coefficient of thermal

expansion of a metallic rod using an optical lever.​

Answer 1

Answer:

Linear thermal expansion is ΔL = αLΔT, where ΔL is the change in length L, ΔT is the change in temperature, and α is the coefficient of linear expansion, which varies slightly with temperature. The change in area due to thermal expansion is ΔA = 2αAΔT, where ΔA is the change in area.