Figure 6-1 in the Above Image (Figure 6-1) , What Part of Part

question 58

Multiple Choice

Figure 6-1
In the above image (Figure 6-1) , what part of the telescope is represented by the pointer?

• A) primary lens
• B) primary mirror
• C) achromatic lens
• D) secondary lens
• E) resolving mirror

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Definitions:

Ultraviolet Light

A type of electromagnetic radiation with a wavelength shorter than that of visible light but longer than X-rays.

Absolute Threshold

The minimum intensity of a stimulus that one can detect 50% of the time.

Brightness

Lightness or luminance; the dimension of visual experience related to the amount (intensity) of light emitted from or reflected by an object.

Dark Room

A room used in photography processing where photographic materials are handled in complete darkness or under a safelight.