What is the critical angle (in degrees)?

1. [1pt]


Consider the figure shown below. Which location indicates where the image of the object will be for the observer?


2. [1pt]


The figure below shows a light ray entering a material of unknown index of refraction from air (n=1.00029). If the incident angle is 26.0 degrees and the refracted angle is 15.0 degrees, what is the index of refraction for the second material?


3. [1pt]


The figure below shows a light ray passing from one material, to another, then to another. Considering the relative angles of the light rays in the figure, which of the following best describes the relative sizes of the indices of refraction?








A) n2%26gt;n1%26gt;n3


B) n1%26gt;n2%26gt;n3


C) n2%26gt;n3%26gt;n1


D) n3%26gt;n2%26gt;n1


4. [1pt]


Consider a ray in a material of index of refraction 1.19 incident upon an interface with a material with index of refraction 1.03. What is the critical angle (in degrees)?

What is the critical angle (in degrees)?
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Q1 Image at point B


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Q2 n2=n1 sin O1/sinO2=1.69422


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Q3 Correct answer is A





n2%26gt;n1%26gt;n3


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Q4 sin C =1.03 /1.19 =0.865546





Critical angle , C =59.945 degree


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Reply:90 dgr

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