Lesson: Redshift Physics

Students will be able to

• understand that if a galaxy is moving very fast away from Earth, the light emitted from it will be redshifted,
• understand that if a galaxy is moving very fast toward Earth, the light emitted from it will be blueshifted,
• understand that we can measure the redshift of a galaxy by looking at the positions of emission or absorption lines in its spectrum,
• recognize spectral line patterns in an emission or absorption spectrum and determine whether they have been redshifted or blueshifted,
• determine, based on spectral lines in an emission or absorption spectrum, whether a galaxy is moving away from or toward Earth,
• use in all permutations,
• use in all permutations,
• use in all permutations.