The sky is flat, like a sheet of paper, and hence angular diameter is the distance measured along that flat sheet of paper.

Name: The sky is flat, like a sheet of paper, and hence angular diameter is the distance measured along that flat sheet of paper.
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Question

Quizplus · Accepted Answer

The sky cannot be considered as a flat sheet of paper. It is a vast three-dimensional expanse and the angular diameter is the angle that an object subtends at the observer's eye.

The Sky Is Flat, Like a Sheet of Paper, and Hence