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Photometer (Noun)

Measuring instrument for measuring the luminous intensity of a source by comparing it (visually or photoelectrically) with a standard source.

Nouns denoting man-made objects.

A photometer was used in the laboratory to measure the brightness of various light sources.
The equipment consisted of a photometer and several light-emitting diodes with different intensities.
The researcher carefully calibrated the photometer before testing the new lamp design.
To compare the luminous intensity of a candle with that of a standard lamp, a photometer was employed.
The technician measured the light output of the LED display using a precise photometer.

Photographic equipment that measures the intensity of light.

Nouns denoting man-made objects.

A photometer is a crucial piece of equipment in professional photography studios to measure the intensity of the lighting setup.
In film development, a photometer is used to adjust the luminosity of the photographic enlarger to achieve the desired exposure.
To set up the lighting correctly for the portrait session, the photographer used a handheld photometer to gauge the light falling on the subject.
Using a digital photometer allows photographers to make precise adjustments to their lighting setup, resulting in well-lit images.
The camera's built-in photometer automatically adjusted the aperture and shutter speed to capture the scene with optimal exposure.