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.
a
3 only
b
2 only
c
1 and 3 only
d
1, 2 and 3
PhysicsSodium Lamps vs. LED Lamps for Street LightingStreet-lightingsodium lampsLED lampslight production360 degreeslife spanvisible light spectrummonochromaticcolour advantages