The horizon glass in an optical square is
A)wholly silvered
B)wholly unsilvered
C)one-fourth silvered and three-fourth unsilvered
D)half silvered and half unsilvered

Question

Quizplus · Accepted Answer

The horizon glass in an optical square is half silvered and half unsilvered. This allows the user to see both the reflected image from the silvered part and the direct view through the unsilvered part simultaneously, facilitating the process of aligning angles or straight lines.

The Horizon Glass in an Optical Square Is