AP (Advanced Placement) Physics(B-C): Questions 520 - 522 of 920
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Question number: 520
Question
In a diffraction experiment performed on a scale where the slit width is fairly large, the angle between bright lines for any set of bright lines becomes very small. In this situation, the diffraction equation, , can take on a simpler form. What is that form, and what is the reason it can be simplified?
Choices
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| a. | , Because is almost equal to for very small angles. |
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| b. | , Because the ratio of to is very close to . |
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| c. | , Because sin and tan are almost equal for very small angles. |
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| d. | , Because when the angle is small, the functions are the same for all values of m. |
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| e. | All of the above |
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Question number: 521
Question
A convex lens of focal length is placed coaxially in constant with a concave lens of focal length . What is the power of the combination?
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| e. | All of the above |
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Question number: 522
Question
How much elongation of a wire long so that the strain is of ? if the wire has cross – section area of and is stretched by , then what is the stress?
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| e. | All of the above |
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