J Judi New member Mar 11, 2010 #1 ...produced equal illuminances..? when the screen is 40cm from one lamp and 160cm form the other. the first lamp is rated at 8 candles. what was the luminous intensity of the second lamp?
...produced equal illuminances..? when the screen is 40cm from one lamp and 160cm form the other. the first lamp is rated at 8 candles. what was the luminous intensity of the second lamp?
