- #1
jsalapide
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If the transparent material has an index of refraction of 1.2, what is the angle of incidence beyond which total internal reflection occurs?
Total Internal Reflection in Refraction Physics: Solving for Critical Angle
- Thread starter jsalapide
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AI Thread Summary
The discussion focuses on calculating the critical angle for total internal reflection in a material with an index of refraction of 1.2, which is determined to be 56.44 degrees. Participants confirm that for total internal reflection to occur, the angle of incidence must be greater than this critical angle. Snell's Law is recommended as a useful tool for solving such problems. The consensus is that the angle beyond which total internal reflection occurs is indeed greater than 56.44 degrees. Overall, the critical angle is a key concept in understanding total internal reflection in refraction physics.
- #2
jsalapide
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I solved for the critical angle and I got 56.44 degrees,
Should the answer be "greater than 56.44 degrees" so that the total internal reflection may occur?
- #3
- 12,178
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EDIT: this is in response to post #1.
You'll have to show some work on the problem before receiving help.
Snell's Law is helpful here. You could also review your textbook or lecture notes discussion of total internal reflection.
Last edited:
- #4
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Correctjsalapide said:
Since they are asking for the angle beyond which total internal reflection occurs, the answer is simply 56 degrees.
Kindly see the attached pdf. My attempt to solve it, is in it.
I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction.
I'm not able to figure out, why my solution is wrong, if it is wrong .
TL;DR Summary: I would like to know the voltmeter readings on the two resistors separately in the picture in the following cases , When one of the keys is closed When both of them are opened (Knowing that the battery has negligible internal resistance)
My thoughts for the first case , one of them must be 12 volt while the other is 0
The second case we'll I think both voltmeter readings should be 12 volt since they are both parallel to the battery and they involve the key within what the...
Here is what I tried
This question was actually asked in one of our engineering entrances.
The answer was 1D.
My teachers say that we have to use μₘ/fₘ to get to this answer. I cannot understand why. I'll be really glad if you could tell me the exact definition of power (numerically) that works in all scenarios.
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