The Sun Has a Radius of 6

question 54

Multiple Choice

The Sun has a radius of 6.955 × 10⁸ km and a rotational period of 25.38 days. What is the difference in the wavelength of the peak of the observed spectrum between light received from the approaching side of the Sun and from the receding side of the Sun? Observations of the middle of the Sun place the spectral peak at 480 nm.

• A) 13 nm
• B) 6.4 nm
• C) 1.6 nm
• D) 3.2 nm