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

QUESTION

Medium

Science & Technology

Prelims 2021

With reference to street lighting, how do sodium lamps differ from LED lamps?

Sodium lamps produce light in 360 degrees but it is not so in the case of LED lamps.
As street-lights, sodium lamps have longer life span than LED lamps.
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

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Explanation

Statement 1 is correct. Sodium lamps emit light in a 360-degree pattern, while LED lamps are directional.

Statement 2 is incorrect. LED lamps generally have a longer lifespan compared to sodium lamps.

Statement 3 is correct. Sodium lamps emit monochromatic light, whereas LED lamps offer a wider spectrum of visible light, providing significant colour advantages in street lighting.

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