Chapter 18 Vocabulary – Optics and Light

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Chapter 18 Vocabulary – Optics and Light 1.

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optics – the study of visible light and the ways in which visible light interacts with the eye to produce vision. law of reflection – states that the angle of reflection equals the angle of incidence. 3.

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regular reflection – the reflection of parallel light rays all in the same direction. diffuse reflection – the reflection of parallel light rays in many different directions. image – a picture of an object formed by waves of light. convex – curved outward. concave – curved inward. focal point – the point at which the rays meet after reflecting from a concave mirror or being refracted by a convex lens. lens – a clear optical tool that refracts light. 10.

focal length – the distance from the center of the lens to the lens’s focal point. 11.

cornea – a transparent membrane that covers the eye. 12.

pupil – a circular opening that controls how much light enters the eye. 13.

retina – structure of the eye that contains specialized cells that respond to light and where the image of an object is projected. 14.

laser – a device that produces an intense, concentrated beam of light that is brighter than sunlight. 15.

fiber optics – technology based on the use of laser light to send signals through transparent wires called optical fibers.

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