photometer

A scientific instrument used to measure the intensity of light, either by comparing a light source to a standard or by measuring light levels for photographic purposes.

• 🇫🇷Instrument scientifique utilisé pour mesurer l'intensité de la lumière, soit en comparant une source lumineuse à une référence, soit en mesurant le niveau d'éclairement à des fins photographiques.

1. Luminous intensity meter C1 formal scientific

   An instrument used to measure the brightness or luminous intensity of a light source by comparing it to a standard source, either visually or photoelectrically.

   • The scientist used a photometer to measure the output of the new LED bulb.
   • A visual photometer compares two light sources side by side.
   • Photoelectric photometers provide more accurate readings than older models.

   🇫🇷Photomètre (mesure de l'intensité lumineuse)

2. Photographic light meter B2 formal technical

   A device used in photography to measure the intensity of light, helping to determine the correct exposure settings.

   • The photographer adjusted the aperture based on the photometer reading.
   • A built-in photometer in the camera helps set the shutter speed.
   • He used a handheld photometer to measure the light in the studio.

   🇫🇷posemètre photographique

   Synonymes: exposure meterlight meter

• photometers plural form
• photometers' possessive plural form
• photometer's possessive singular form