T = \frac{0.0029 meters}{λ_{max}} Kelvin

\frac{v}{c} = \frac{λ − λ_{0}}{λ_{0}}

\frac{λ − λ_{0}}{λ_{0}} = \frac{500.75 − 500.70}{500.70} = \frac{0.05}{500.70} = 0.0001