AP (Advanced Placement) Physics(B-C): Questions 520 - 522 of 921

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Question number: 520

» Light & Optics

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MCQ▾

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

Choice (5)Response

a.

, Because is almost equal to for very small angles.

b.

, Because the ratio of to is very close to .

c.

, Because sin and tan are almost equal for very small angles.

d.

, Because when the angle is small, the functions are the same for all values of m.

e.

None of the above

Question number: 521

» Light & Optics

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MCQ▾

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?

Choices

Choice (5)Response

a.

b.

c.

d.

e.

Question does not provide sufficient data or is vague

Question number: 522

» Fluids & Solids

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MCQ▾

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?

Choices

Choice (5)Response

a.

b.

c.

d.

e.

None of the above

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