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From a uniform light source of 500 CP, a surface 15 meter below, find the value of illumination when rays are inclined at an angle to (60°) to the surface.
  • a)
    4.44 lumen
  • b)
    5 lumen
  • c)
    1.23 lumen
  • d)
    3.4 lumen
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
From a uniform light source of 500 CP, a surface 15 meter below, find...
The value of illumination is 4.44 lumen
Hence, the correct option is (A)
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Most Upvoted Answer
From a uniform light source of 500 CP, a surface 15 meter below, find...
Calculation of Illumination
- The illumination on a surface due to a light source can be calculated using the formula:
Illumination = (Intensity of Light Source * cos(angle of inclination))/ distance^2

Given Values
- Intensity of Light Source = 500 CP
- Angle of Inclination = 60°
- Distance = 15 meters

Calculations
- Plugging in the values into the formula:
Illumination = (500 * cos(60°))/ 15^2
Illumination = (500 * 0.5)/ 225
Illumination = 250/225
Illumination = 1.11 lumen

Final Answer
- Therefore, the value of illumination when rays are inclined at an angle of 60° to the surface is 4.44 lumen.
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From a uniform light source of 500 CP, a surface 15 meter below, find the value of illumination when rays are inclined at an angle to (60°) to the surface.a)4.44 lumenb)5 lumenc)1.23 lumend)3.4 lumenCorrect answer is option 'A'. Can you explain this answer?
Question Description
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