The Distance Modulus Formula (5.10.2)

Question 1

• The distance modulus formula: M = 5 log r - 5.

Answer 1

• The distance modulus formula: M = 5 log r - 5.

Question 2

• The variables in the distance modulus formula are:
• M, for magnitude, which uses a star’s brightness as measured by the observer to calculate its distance from the observer.
• r, the star’s distance measured in parsecs, a value equal to approximately 3.3 light years.

Answer 2

• The variables in the distance modulus formula are:
• M, for magnitude, which uses a star’s brightness as measured by the observer to calculate its distance from the observer.
• r, the star’s distance measured in parsecs, a value equal to approximately 3.3 light years.

Question 3

• The distance modulus formula is used to calculate high distances.

Answer 3

• The distance modulus formula is used to calculate high distances.