Physics · Optics and Photometry
What adjustment is typically made to a visual photometer head during the measurement process to compare two light sources?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1It is moved linearly between the two light sources until the illumination on both sides of the photometer screen appears equal.✓
- 2It is tilted along the longitudinal axis to alter the angle of incidence.
- 3It is elevated vertically to match the geographical height of the observer.
- 4It is rotated rapidly in a horizontal plane to measure angular distribution.
Correct answer
It is moved linearly between the two light sources until the illumination on both sides of the photometer screen appears equal.
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