Illuminance is how much light shines on a surface, like when you stand under a lamp and feel it brightening your face.
Imagine you're playing in a room with a big lamp. When the lamp is turned all the way up, it feels super bright, that’s high illuminance. But if the lamp is dimmed down, the light feels softer, that’s lower illuminance.
Think of it like rain falling on your hands. If it's a gentle drizzle, you feel just a little bit of water, that’s low illuminance. But if it's a heavy storm, your hands get completely soaked, that’s high illuminance.
How Distance Changes Illuminance
If you move closer to the lamp, the light feels brighter, like when you go right under a flashlight in the dark. If you step back, the light seems softer, just like when you're far away from the sun at noon.
So, illuminance is how much light lands on a surface, and it depends on how bright the source is and how close you are to it. Illuminance is how much light shines on a surface, like when you stand under a lamp and feel it brightening your face.
Imagine you're playing in a room with a big lamp. When the lamp is turned all the way up, it feels super bright, that’s high illuminance. But if the lamp is dimmed down, the light feels softer, that’s lower illuminance.
Think of it like rain falling on your hands. If it's a gentle drizzle, you feel just a little bit of water, that’s low illuminance. But if it's a heavy storm, your hands get completely soaked, that’s high illuminance.
Examples
- A sunny day has about 100,000 lux, while a cloudy day might only have 10,000 lux.
- Reading in a well-lit room feels easier than reading in a dimly lit room because of higher illuminance levels.