Exam-style question
Try this first
Parallax baseline: Pick the distance method based on apparent annual angular shift. This tests Use distance modulus relationships where appropriate. in Absolute magnitude.
- A.Parallax baseline answer: Nearby-star parallax uses Earth-orbit baseline and small angle geometry.
- B.Parallax baseline distractor: Parallax is caused by galaxy expansion.
- C.Parallax baseline misconception: Parallax is the same as absolute magnitude.
- D.Parallax baseline off-scope: Parallax measures blackbody peak wavelength.
Model answer
What a good answer should say
- The correct option is Parallax baseline answer: Nearby-star parallax uses Earth-orbit baseline and small angle geometry.
Explanation
Why this works
It is correct because it applies Absolute magnitude evidence to Use distance modulus relationships where appropriate.. The other options are incorrect because they swap in a different astrophysics measurement, telescope property or cosmology idea.
Common mistake
No common mistake is linked to this question yet.