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Two identical lamps are positioned 2 (m) above a level footpath. They radiate uniformly in all directions and the lumino
Posted: Thu May 12, 2022 2:11 pm
by answerhappygod
- Two Identical Lamps Are Positioned 2 M Above A Level Footpath They Radiate Uniformly In All Directions And The Lumino 1 (67.86 KiB) Viewed 32 times
Two identical lamps are positioned 2 (m) above a level footpath. They radiate uniformly in all directions and the luminous intensity of each lamp is 300 (cd). (1) Determine the maximum horizontal distance between two lamps if the direct illuminance level on the footpath between these two lamps should not be less than 20 (1x). (14 marks (ii) Determine the minimum illuminance level on the footpath between these two lamps if the horizontal distance between lamps is 10(m). (8 marks)