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Chapter 9: Problem 4

What is the process by which the thickness of the lens is changed in order to focus light properly?

Short Answer

Expert verified
The process of changing the thickness of a lens to adjust the focus of light is known as accommodation.

Step by step solution

01

Understanding the Role of a Lens

A lens works by refracting, or bending, light as it enters the lens. This refraction is what allows a lens to focus light. The degree of bending and focusing is determined by the thickness and curvature of the lens.
02

Effect of Changing Lens Thickness

When a lens's thickness is changed, it alters how the light is refracted. If the lens becomes thicker, it will bend the light more, causing it to focus at a shorter distance. Conversely, if the lens becomes thinner, it will bend the light less, causing it to focus at a greater distance.
03

Identifying the Process

The process of changing the thickness of a lens to adjust the focus of light is called accommodation. This often refers to the action of the eye, in which the ciliary muscles adjust the shape of the lens to fine-tune the focus of objects at varying distances. In optical instruments, a similar process takes place by mechanically adjusting the lens's thickness.

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