The illuminance on a surface is 3.5 lux, and the surface is 2 meters from the light source. What’s the intensity of the source?

Question

asked Jun 24, 2020 94.8k views

1 Answer

Jwillker · Answer 1 · 2020-06-28T09:58:47+0000

The intensity is 49 Candelabra

The formula for calculation the luminous intensity is;

Luminous intensity = illuminance × square radius

Lv = Ev × r²

= 3.5 × 2²

= 3.5 × 14

= 49 Candelabra