Question

3. The distance from a makeup mirror to C (the radius of curvature) is 70 cm. How far from the mirror
can a person be and still see an upright, magnified image?

Answer 1

The far point from the mirror can a person be and still see an upright, magnified image is focus i.e. 35cm from mirror.

What is  radius of curvature?

The mirror is made out of a sphere which has its radius called the radius of curvature.

The focal length f is half of the radius of curvature R of the lens.

Given the radius of curvature is 70cm, then focal length will be 70/2 = 35cm.

The makeup mirror is a concave mirror which forms real and upright images. The magnified images are obtained when the object is placed between focus and mirror.

Thus, the far point is focus i.e. 35cm from mirror.

Learn more about radius of curvature.

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