Exam-style question
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Which of the following is the correct conversion between parallax angle (in arcseconds) and distance in parsecs?.
- A.d = p
- B.d = 1/p
- C.d = p^2
- D.d = 1/p^2
Model answer
What a good answer should say
- d = 1/p
Explanation
Why this works
Formula: d = 1/p, where d is distance in parsecs and p is parallax angle in arcseconds. Substitution: p = parallax angle.
Working: d = 1/p. Units/conclusion: Distance in parsecs equals the reciprocal of the parallax angle in arcseconds.
Common mistake
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