The Sun Has Apparent Brightness at Earth (1

question 5

Multiple Choice

The Sun has apparent brightness at Earth (1.5 × 10⁸ km away) of B. What would be the apparent brightness of the Sun at Pluto, which is 6.0 × 10⁹ km from the Sun?

• A)0.50 B
• B)0.25 B
• C)0.063 B
• D)0.025 B
• E)0.00063 B