A Helium Neon Laser Generates Light of 632

question 139

Multiple Choice

A helium neon laser generates light of 632.8-nm wavelength.What color is that?

• A)blue
• B)yellow
• C)red
• D)green

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Definitions:

Ectasis

A medical term that describes the widening or enlargement of a hollow organ or structure.

Circum-

A prefix in English denoting around, about, or surrounding something.

Epi-

Refers to being above, over, or on top of something, often used as a prefix in medical and biological terms to denote a higher position or an outer layer.

Tachy-

A prefix meaning "fast" or "swift," used in medical terminology to denote an abnormally rapid state, such as in "tachycardia" for rapid heartbeat.