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Light is shined into a glass rod. To guarantee the total internal reflection (TIR) happens to all the possible rays, what is the minimum index of refraction n for the glass?
Hint: To make sure all rays TIR inside the rod, you just need to consider an extreme case, i.e., the incident angle q1 (on the top surface of glass rod) equals to 90o.
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Give the conditions needed for production and observation of interference pattern?
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The statement ‘Charge is quantized’?
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My question is that if voltage is increased, the electrons will move faster and the distance between them is changed. Why?
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