You want to have an illuminance of 300 lux on Mrs. Pott (under the SPOTLIGHT#1). What is the Luminous Flux (lumen) the lamp need to releases assuming homogeneous distribution of the light in the illuminated circle? Given the following scene on the stageSpotlight #11 meter diameterSpotlight #22 meters diameterBoth spotlights SPOTLIGHT#1 and SPOTLIGHT#2 are place at 20 meters from the stage. You wantto produce a circle of light of 1meter diameter with the SPOTLIGHT#1and a circle of light of 2meters diameter with the SPOTLIGHT#2

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You want to have an illuminance of 300 lux on Mrs. Pott (under the SPOTLIGHT#1). What is the Luminous Flux (lumen) the lamp need to releases assuming homogeneous distribution of the light in the illuminated circle?

You want to have an illuminance of 300 lux on Mrs. Pott (under the SPOTLIGHT#1). What is the Luminous Flux (lumen) the lamp need to releases assuming homogeneous distribution of the light in the illuminated circle?

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter11: Heat Transfer By Radiation

Section: Chapter Questions

Problem 11.11P

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Concept explainers

Radiation

Radiation can be described as the energy in the form of a particular matter or electromagnetic waves traveling in the air and can be in the form of light, sound, and heat. Radiation can be detected through special instruments like X-rays. The radiation from a cooler object is less intense as compared to the radiation from hot objects.

Question

Given the following scene on the stage
Spotlight #1
1 meter diameter
Spotlight #2
2 meters diameter
Both spotlights SPOTLIGHT#1 and SPOTLIGHT#2 are place at 20 meters from the stage. You want
to produce a circle of light of 1meter diameter with the SPOTLIGHT#1and a circle of light of 2
meters diameter with the SPOTLIGHT#2

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