How does earth’s magnetosphere protect our atmosphere?.

Ared apple is illuminated by a blue light the apple will appear

What happens to light waves from a star as the star moves away from earth?

Two students, each riding bicycles, start from the same apartment building and ride to the same building on campus, but each takes a different route. the first student rides 1100 m due east and then turns due north and travels another 1430 m before arriving at the destination. the second student heads due north for 1930 m and then turns and heads directly toward the destination.at the turning point, how far is the second student from the destination?