Red ( visible) light has a wavelength of 7×10-7m. how much energy does a photon if red light have?

When a comet collides with earth, it adds material to our planet and causes great damage. therefore, a collision like this is a a. destructive force b. constructive force c. geologic process and event d. constructive and destructive force

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.

Ineed ! i have no clue how to do this problem.