AP (Advanced Placement) Physics(B-C): Questions 664 - 665 of 920

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Question number: 664

» Light & Optics

MCQ▾

Question

An interference pattern is produced by light from a monochromatic source passing through a double slit. The amplitude of the pattern at the very center is a maximum because the path length difference from each slit to the center of the screen is:

Choices

Choice (5) Response

a.

One half wavelength

b.

Maximum

c.

Zero

d.

One wavelength

e.

None of the above

Question number: 665

» Light & Optics

MCQ▾

Question

Which of the following statements provides the cause of and a possible solution for spherical lens aberration?

Choices

Choice (5) Response

a.

Spherical aberration is produced when a lens bends different wavelengths of light by different amounts, causing multiple focal points. Making the lens more spherical will cause red light to bend more, reducing the effect.

b.

Spherical aberration is produced when a spherical lens bends light from the edges to a closer focal point than light passing through closer to the center. Making the lens non spherical will improve focus.

c.

Spherical aberration is produced when the lens is ground so the focal length is greater than , where is the radius of curvature. Grinding the lens so that it is spherical but has less curvature will improve focus.

d.

Spherical aberration is produced when a lens is not perfectly spherical, causing light to focus at multiple points. Both sides of the lens should be ground so that it is perfectly spherical.

e.

None of the above

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