The angular size of an object depends on which two quantities?
A)the object's actual size and its mass
B)the object's distance from us and its brightness
C)the object's actual size and its distance from us
D)the objects brightness and its mass

Question

Quizplus · Accepted Answer

The angular size of an object depends on its actual size and its distance from us. The farther away an object is, the smaller its angular size will appear even if its actual size is large. Conversely, the closer an object is, the larger its angular size will appear even if its actual size is small. A and D are incorrect because mass and brightness do not affect an object's angular size. B is incorrect because distance and brightness affect an object's apparent brightness or magnitude, not its angular size. Angular size is the angle subtended by an object at a particular point. It depends on the actual size of the object and its distance from us. The brightness and mass of the object do not have any direct impact on its angular size.

The Angular Size of an Object Depends on Which Two