De qué está hecho fotómetro
A light meter.
- Paper screen with grease spot — tiene como parte. The spot vanishes when both sides are equally lit.
- Photometer bench scale — tiene como parte. The distance to the sources.
- Reflexión de la luz — utiliza. Brightness is judged from reflected light.
- Papel — está hecho de. A photometer compares the illumination of paper screens.