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Incident Luminous Flux refers to the total amount of visible light energy emitted or received by a surface per unit time. It is a fundamental concept in photometry and lighting design.
The calculator uses the formula:
Where:
Explanation: This formula calculates the incident luminous flux by dividing the reflected luminous flux by the reflection factor of the surface.
Details: Accurate calculation of incident luminous flux is crucial for lighting design, energy efficiency assessments, and understanding how surfaces interact with light in various environments.
Tips: Enter the reflected luminous flux in lumens and the reflection factor (a dimensionless value between 0 and 1). Both values must be positive numbers.
Q1: What is the typical range for reflection factor?
A: Reflection factor typically ranges from 0 (perfect absorber) to 1 (perfect reflector), with most real-world surfaces having values between 0.1 and 0.9.
Q2: How is reflected luminous flux measured?
A: Reflected luminous flux is typically measured using photometric instruments such as lux meters or integrating spheres that can capture and quantify reflected light.
Q3: What factors affect reflection factor?
A: Surface material, color, texture, finish, and angle of incidence all influence the reflection factor of a surface.
Q4: Can this formula be used for colored surfaces?
A: Yes, but the reflection factor should be measured for the specific wavelength or color of light being used, as reflection properties can vary with wavelength.
Q5: How accurate is this calculation?
A: The accuracy depends on the precision of the input values. For highly accurate results, use precisely measured values of reflected flux and reflection factor.