91Ó°ÊÓ

Question: Explain the relationship between magnification, object distance, and image distance, and the significance of the sign and magnitude of the magnification. Answer: The magnification of a lens is given by the equation m = - (v / u), where m is the magnification, v is the image distance, and u is the object distance. An increase in object distance generally leads to a decrease in magnification, while an increase in image distance can either increase or decrease the magnification depending on the sign of the magnification. A positive magnification indicates an upright image, while a negative magnification indicates an inverted image. The magnitude of the magnification informs us whether the image is larger, smaller, or the same size as the object (|m| > 1, |m| < 1, or |m| = 1, respectively).