[Solved] 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-light, sodium lamps have a 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.

Q72. 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-light, sodium lamps have a 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.

a) 3 Only

b) 2 Only

c) 1 and 3 Only

d) 1,2 And 3

Answer: c