The Light Source in a Microscope Is Ultraviolet (UV) Light

question 39

Multiple Choice

The light source in a microscope is ultraviolet (UV) light.

• A) fluorescent
• B) phase-contrast
• C) Nomarski
• D) bright-field
• E) dark-field

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Definitions:

Extinction

The diminishing of a conditioned response; occurs in classical conditioning when an unconditioned stimulus (US) does not follow a conditioned stimulus (CS); occurs in operant conditioning when a response is no longer reinforced.

Conditioned Stimulus

A stimulus that, through association with an unconditioned stimulus, comes to elicit a response similar to the response to the unconditioned stimulus.

Conditioned Response

A learned reaction to a specific stimulus as a result of conditioning.

Presenting Light

The act of providing or exposing to light, particularly in contexts where visibility or attention is enhanced or required.