The focal point of a lens is determined by
A) the shape of the two surfaces of the lens.
B) the index of refraction of the lens material.
C) only the shape if you have a negative lens, otherwise only the index of refraction.
D) both shape and index of refraction.

Question

Quizplus · Accepted Answer

The focal point of a lens is determined by both its shape and index of refraction. The curvature of the lens surfaces and the refractive index of the lens material affect how light waves bend as they pass through the lens, ultimately determining where the focal point is located. Therefore, both shape and index of refraction must be considered when determining the focal point of a lens.

The Focal Point of a Lens Is Determined by