Final answer:
To calculate the speed of a star, we can use the concept of redshift.
Step-by-step explanation:
In order to calculate the speed of a star, we can use the concept of redshift. Redshift occurs when the wavelength of light is shifted to a longer wavelength, indicating that the star is moving away from us. The formula to calculate the speed is given by:
Speed = (Change in Wavelength / Rest Wavelength) * Speed of Light
In this case, the change in wavelength is 0.1 nm and the rest wavelength is 500 nm. Plugging in these values, we can find the speed.