Question

The angle subtended by the thickness of a ¼-inch thick pencil at 15 feet from the eye. Give your answer in radians and in degrees

Answer 1

The value of the angle in radians is $\psi = \frac{0.25\frac{1}{12}}{15} = 1.4\cdot10^{-3}$ radians

The value of the angle in degrees is $\beta = \psi\frac{180}{3.14} = 0.08$ degrees