Part 1 A laser beam consists of parallel rays of light. To convert this light to

Question

Part 1

A laser beam consists of parallel rays of light. To convert this light to the diverging rays required for a scanning confocal microscope requires

A. a converging lens.

B. a diverging lens.

C. either a converging or a diverging lens.

Part 2

If, because of a poor-quality objective, the light from the laser illuminating the sample in a scanning confocal microscope is focused to a larger spot,

A. the image would be dimmer because the light illuminating the point imaged would be dimmer.

B. the image would be blurry because light from more than one point would reach the detector.

C. the image would be dimmer and blurry-both of the above problems would exist.

Part 3

The resolution of a scanning confocal microscope is limited by diffraction, just as for a regular microscope. In principle, switching to a laser with a shorter wavelength would provide

A. greater resolution.

B. the same resolution.

C. lesser resolution.

Part 4

In the optical system shown in the passage, the distance from the source of the diverging light rays to the sample is (Blank) the distance from the sample to the screen.

A. less than

B. greater than

C. the same as

Explanation / Answer

Part A - either a converging or a diverging lens

Part B - the image would be blurry because...

Part C - greater resolution

Part D - the same as

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