To calculate the illuminance:
\[ E = \frac{F}{d^2} \]
Where:
Illuminance is a measure of how much luminous flux is spread over a given area. It is commonly measured in lux (lx), where one lux is equal to one lumen per square meter. Illuminance is an important concept in lighting design, as it helps in understanding how well a space will be lit and how evenly the light will be distributed. Higher illuminance levels indicate brighter lighting, while lower levels indicate dimmer lighting.
Let's assume the following values:
Using the formula:
\[ E = \frac{800}{2^2} = \frac{800}{4} = 200 \, \text{lux} \]
The Illuminance is 200 lux.
Let's assume the following values:
Using the formula:
\[ E = \frac{1000}{3^2} = \frac{1000}{9} \approx 111.11 \, \text{lux} \]
The Illuminance is approximately 111.11 lux.