Physics · Lighting and Illumination
What is the primary effect of increasing the pressure and temperature in a high-pressure sodium (HPS) lamp?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1It prevents the emission of visible light completely.
- 2It narrows the emission spectrum to a monochromatic line.
- 3It decreases the operating voltage across the discharge tube.
- 4It broadens the sodium emission spectrum away from the D-line resonance.✓
Correct answer
It broadens the sodium emission spectrum away from the D-line resonance.
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