Question
A virtual image has a positive image distance; a real image has a negative image distance. A converging lens has a negative focal length; a diverging lens has a positive focal length. When the object is on the same side of the reflecting or refracting surface as the incoming light, the object distance is positive; otherwise, it is negative. When the center of curvature of a spherical mirror is on the same side as the reflected light, the radius of curvature is positive; otherwise, it is negative. For an upright image, the magnification is positive; for an inverted image, the magnification is negative A virtual image has a positive image distance; a real image has a negative image distance. A converging lens has a negative focal length; a diverging lens has a positive focal length. When the object is on the same side of the reflecting or refracting surface as the incoming light, the object distance is positive; otherwise, it is negative. When the center of curvature of a spherical mirror is on the same side as the reflected light, the radius of curvature is positive; otherwise, it is negative. For an upright image, the magnification is positive; for an inverted image, the magnification is negative
Explanation / Answer
When the object is on the same side of the reflecting or refracting surface as the incoming light, the object distance is positive; otherwise, it is negative. When the object is on the same side of the reflecting or refracting surface as the incoming light, the object distance is positive; otherwise, it is negative. When the object is on the same side of the reflecting or refracting surface as the incoming light, the object distance is positive; otherwise, it is negative. For an upright image, the magnification is positive; for an inverted image, the magnification is negative.