Which statement best matches angular magnification?

Which statement best matches angular magnification?

• A. The enlargement is based on moving closer to the observer.
• B. The size of the object at a given location is increased through optical principles.
• C. The object is physically enlarged.
• D. Magnification is accomplished through electronics.

Answer: (B)

Angular magnification is about how large an object appears to the eye, which depends on the angle the object subtends at the eye, not its actual size. When an optical device like a magnifier is used, it makes the image subtend a larger angle at the eye, so the object looks bigger even though its real size hasn’t changed. That’s why the statement describing the enlargement as occurring through optical principles and by increasing the angular size at a given location is the best fit. Moving closer can increase what you see, but it doesn’t define how magnification is achieved with optics. Physically enlarging the object would be a change in actual size, not how it appears through the eye. Electronics aren’t involved in optical angular magnification.

Angular magnification is about how large an object appears to the eye, which depends on the angle the object subtends at the eye, not its actual size. When an optical device like a magnifier is used, it makes the image subtend a larger angle at the eye, so the object looks bigger even though its real size hasn’t changed. That’s why the statement describing the enlargement as occurring through optical principles and by increasing the angular size at a given location is the best fit.

Moving closer can increase what you see, but it doesn’t define how magnification is achieved with optics. Physically enlarging the object would be a change in actual size, not how it appears through the eye. Electronics aren’t involved in optical angular magnification.