The table from the problem #4 is illuminated by a lamp placed on the ceiling. The lamp irradiate light ia all directions. The distance from the ceiling to the table is 5 meters. 1) What is the luminous flux [lumens] the lamp need to release? 2) What will be the power needed to produce the needed luminous flux if the lamp is a CFL lamp with an efficacy of 60 lumen/watt
The table from the problem #4 is illuminated by a lamp placed on the ceiling. The lamp irradiate light ia all directions. The distance from the ceiling to the table is 5 meters. 1) What is the luminous flux [lumens] the lamp need to release? 2) What will be the power needed to produce the needed luminous flux if the lamp is a CFL lamp with an efficacy of 60 lumen/watt
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![Problem #4
The luminous flux on a table is 400 Lumens. The dimensions of the table are 100cm by 200cm.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F10fe2450-1369-43ac-b245-d62a2482d3d1%2F8c732c9b-95ec-4586-be37-701a5d2c8a10%2F4r5veu9_processed.png&w=3840&q=75)
Transcribed Image Text:Problem #4
The luminous flux on a table is 400 Lumens. The dimensions of the table are 100cm by 200cm.
![Problem #5
The table from the problem #4 is illuminated by a lamp placed on the ceiling. The lamp irradiate light ia
all directions. The distance from the ceiling to the table is 5 meters.
1) What is the luminous flux [lumens] the lamp need to release?
2)
What will be the power needed to produce the needed luminous flux if the lamp is a CFL lamp
with an efficacy of 60 lumen/watt](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F10fe2450-1369-43ac-b245-d62a2482d3d1%2F8c732c9b-95ec-4586-be37-701a5d2c8a10%2Ftnepd8r_processed.png&w=3840&q=75)
Transcribed Image Text:Problem #5
The table from the problem #4 is illuminated by a lamp placed on the ceiling. The lamp irradiate light ia
all directions. The distance from the ceiling to the table is 5 meters.
1) What is the luminous flux [lumens] the lamp need to release?
2)
What will be the power needed to produce the needed luminous flux if the lamp is a CFL lamp
with an efficacy of 60 lumen/watt
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