A teacher asks two students to explain redshift. Student 1 says: It is a reduction in the observed wavelength of electromagnetic radiation from stars. Student 2 says: It occurs because stars and galaxies move away from the Earth. Which students are correct?
- Aboth student 1 and student 2
- Bstudent 1 only
- Cstudent 2 only
- Dneither student 1 nor student 2