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a light bulb is 4.1 m from a surface. how much luminous flux must the bulb produce if the illuminance required is 22 lx?

Respuesta :

queenmeg
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Cricetus

The luminous flux will be "4.65×10³ lm".

Given;

Distance b/t source and light bulb,

  • d = 4.1 m

Illuminance,

  • E = 22 lx

The formula,

→ [tex]P = E\times 4 \pi d^2[/tex]

By substituting the values, we get

      [tex]= 22\times 4 \pi\times (4.1)^2[/tex]

      [tex]= 4647.3 \ lx \ m^2[/tex]

      [tex]= 4.65\times 10^3 \ lm[/tex]

Thus the answer above is appropriate.

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https://brainly.com/question/15481624

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