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Chapter 25: Q9CQ (page 927)

Suppose light were incident from air onto a material that had a negative index of refraction, say 鈥�1.3; where does the refracted light ray go?

Short Answer

Expert verified

The refracted light ray travels through the medium "towards" the source.

Step by step solution

01

Definition of thermometer

Refraction is the change in the direction of a wave as it travels from one medium to another or as the medium gradually changes. Although light refraction is the most commonly observed phenomenon, other waves, such as sound and water waves, also experience refraction.

02

Explanation

Refracted light would act as a mirror image of light with a positive refractive index, reflecting within the medium but away from the source.

Consider the required figure,

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The most common type of mirage is an illusion that light from faraway objects is reflected by a pool of water that is not really there. Mirages are generally observed in deserts, when there is a hot layer of air near the ground. Given that the refractive index of air is lower for air at higher temperatures, explain how mirages can be formed.

The Ray Aspect of Light

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Image Caption

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