in your lab, you are timing a chemical reaction. an astronaut travelling past your laboratory at u 0.866c observes the process to take 2.23 s. what time did you observe for the process?

The solar panels used by mark function because of the photoelectric effect. light shines on the cells causing electrons to be ejected from the metal, which produces an electric current. at night on mars, no light will fall on the solar cells and no electric current will be generated. according to your notes, what type of light is typically needed to cause the photoelectric effect? a)visible b)ultraviolet c)infrared