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5.
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Which word is used to describe light's changing direction as it passes from one medium to another?
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Refraction refers to how light slows and bends when passing from air, a light-density medium into transparent glass or plastic, a high-density medium. When light passes from air through a denser medium such as a lens, the light will bend toward the normal because of the changing velocity at the surface between the two media. Diffusion refers to light being scattered when passing through an irregular surface. Reflection is when light is bounced off a smooth surface, the light will reflect at the same angle as it does when it hits the surface. Dispersion is when white light is split into its component colors: red, orange, yellow, green, blue, and violet, when refracted.
Incorrect answer. Please choose another answer.
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8.
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What is the term used to describe the eye's tendency to turn from its normal position?
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A phoria is defined as a misalignment of the eyes, appearing only when binocular viewing is broken. It is only apparent some of the time and occurs when the eyes are fatigued, and the person cannot compensate for the deviation. Unlike a phoria, a tropia is when the eye never straightens out and is constantly turned in, out, up, or down. Exophoria occurs when the eyes drift outward but is temporary, usually caused when the eyes are tired or stressed, or during close vision tasks. Exotropia is also an outward turning of the eyes; however, it is more frequent and noticeable, even when both eyes are open and trying to work together. Exophoria occurs when the eyes drift outward but is temporary, usually caused when the eyes are tired or stressed, or during close vision tasks. Exotropia is also an outward turning of the eyes, however, it is more frequent and noticeable, even when both eyes are open and trying to work together.
Incorrect answer. Please choose another answer.
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