Attempt this previous-year question. The correct option stays hidden until you choose.
With reference to street lighting, how do sodium lamps differ from LED lamps?
1. Sodium lamps produce light in 360 degrees but it is not so in the case of LED lamps.
2. As street-lights, sodium lamps have longer life span than LED lamps.
3. The spectrum of visible light from sodium lamps is almost monochromatic while LED lamps offer significant colour advantages in street lighting.
Select the correct answer using the code given below
Pick an option to check yourself.
• Correct Answer: C
• Sodium lamps are omnidirectional (360°) with monochromatic spectrum; LEDs are directional with superior color rendering index.
• Statement 2 is incorrect: LEDs have longer lifespan (50,000-100,000 hours) than sodium lamps (18,000-40,000 hours).
Attempt Prelims MCQs or open Mains questions by paper — then continue the same bank inside the app with visual decks.
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