A convex lens has a focal length of 7.60126 cm. The object distance is 9.15254 c

Question

A convex lens has a focal length of 7.60126 cm. The object distance is 9.15254 cm. Find the image distance. Answer in units of cm.

Find the magnification.

A concave lens has a focal length of 25.2344 cm. The object distance is 11.875 cm. Find the image distance. Answer in units of cm.

Find the magnification.

A convex lens has a focal length of 1.43951 cm. The object distance is 1.17778 cm. Find the image distance. Answer in units of cm.

Find the magnification.

A convex lens has a focal length of 9.92227 cm. The object distance is 25.9259 cm. Find the image distance. Answer in units of cm.

Find the magnification.

Explanation / Answer

Object distance (p) to the convex lens = 4 cm Let q is the image distance to the convex lens. As we know the lens equation is (1 / f) = (1 / p) + (1 / q) (1 / q) = (1 / f) - (1 / p) = (p - f) / (pf) q = (pf) / (p - f) = (4 cm)(3.38462 cm) / (4 cm - 3.38462 cm) = 22 cm Hence image distance (q) to the convex lens is 22 cm ------------------------------------------------------------------------------------------------ Magnification (M) of the lens is M = -q/p = -(22 cm) / (4 cm) = -5.5

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