t-which-conclusion-is-necessarily-correct-for-a-single-lens-setup-in-this-lesson

Question

A thin lens forms an upright image with positive magnification for a real object. Which conclusion is necessarily correct for a single-lens setup in this lesson?

Accepted Answer

The image distance is negative.

Answer

The object distance must be negative.

Answer

The focal length must be positive.

Answer

The image must be real.