Speed of light in the vacuum
If a material has an index of refraction 2.35, what is the speed of light in this material. Consider the speed of light in the vacuum c = 300000000 m/s. Express the answer with one decimal place.
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The speed of light in a material is 0.41 c. What is the critical angle of a light ray at the interface between the material and a vacuum?
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Diffraction also occurs with sound waves. Consider 1300-Hz sound waves diffracted by a door that is 84 cm wide. What is the angle between the two first-order diffraction minima?
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A force acting on an object is approximated as F = 4 sin (100pt) N from t = 0 to t = 10 ms. Calculate the impulse on the object
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