MCQs on Photometry
MCQs on Photometry What is the power of the lamp if its luminous efficiency is 2 lumen/watt and its luminous intensity is 42 candela? 62 W 138 W 76 W 264 W Answer: (d) 264 W In a movie hall,…
MCQs on Photometry What is the power of the lamp if its luminous efficiency is 2 lumen/watt and its luminous intensity is 42 candela? 62 W 138 W 76 W 264 W Answer: (d) 264 W In a movie hall,…