A dime is 1.8 cm in diameter. At what distance from your eye would you have to hold a dime so that it has the same angular diameter as the full moon?
A) 2 m
B) 2 cm
C) 2 km
D) 2 inches
E) 2 ft

Question

Quizplus · Accepted Answer

The angular diameter of the full moon is about 0.5 degrees. To have the same angular diameter, the dime must be held at a distance where its diameter subtends the same angle. Using the formula for angular diameter (angle = diameter/distance), the distance is approximately 2 meters.

A Dime Is 1