A Student Sets the Cross-Hairs of an Eyepiece in Line

question 61

Multiple Choice

A student sets the cross-hairs of an eyepiece in line with an image that he is measuring. He then notes that when he moves his head slightly to the right, the image moves slightly to the left (with respect to the cross-hairs) . Therefore the image is:

• A) infinitely far away
• B) farther away from him that the cross-hairs
• C) nearer to him than the cross-hairs
• D) in the focal plane of the eyepiece
• E) in the plane of the cross-hairs

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Definitions:

Thrombolysis

The breakdown of blood clots by pharmacological means, often used in treating certain types of strokes and heart attacks.

Tomography

A diagnostic imaging technique that creates detailed cross-sectional images of internal organs or tissues.

Combining Form

A linguistic unit that occurs in combination with another form to create a word with a new meaning.

International Unit

A unit of measurement for the amount of a substance, based on measured biological activity or effect.