Discussion
Match each ultraviolet condition with what it represents.
List I
A. UV included
B. UV excluded
C. UV calibrated
D. UV adjustable filter
List II
1. the ultraviolet is set to match an illuminant
2. the full source output reaches the sample
3. the mechanism that permits the setting
4. a filter removes the ultraviolet entirely
Answer: A
Correct answer: A-2, B-4, C-1, D-3
Four ultraviolet conditions. With ultraviolet included the full source output reaches the sample, so any brightener fluoresces fully. With it excluded a filter removes the ultraviolet entirely and the brightener contributes nothing. UV calibrated sets the ultraviolet content to match a defined illuminant, and the adjustable filter is the mechanism by which that setting is made.
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