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How to find critical angle

Which of the following statements must be true about this prism's critical angle for the violet light shown below?prism diagram
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Which of the following is necessary for total internal reflection to occur?Group of answer choices the angle of incidence must
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A beam of light is incident from air on the surface of a liquid. If the angle of incidence is 25.0° and the angle of refraction
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2. asked by julie
3. 1,273 views
f(x)=x+1/x Find all critical numbers. Find where the function is increasing and decreasing. Find critical points and identify
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2. asked by CALCULUS!!!
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If a transparent material has a refractive of 2.0;a) calculate the critical angle b) if the refractive index were less than 2,0,
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2. asked by Cathy
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The light ray strikes the hypotenuse of the prism at an angle of incidence greater than the critical angle. Find the angle phi
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2. asked by Brandi
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How to find critical angle using n?
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2. asked by Terry
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Aray of light traveling through air is incident on the smooth flat slab of crown glass at an angle of 30 to the normal.take the
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2. asked by John
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Are endpoints also critical points?I'm trying to find the critical points of a function on the interval [-1,5]. So far,the only
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2. asked by Anonymous
3. 745 views
Find the critical point and the interval on which the given function is increasing or decreasing, and apply the First Derivative
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2. asked by Ashton
3. 1,521 views