Photometer

/fə‍ʊtˈɒmɪtɐ/

/fəˈtɑmɪtɝ/

Photometer

photographic equipment that measures the intensity of light

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

Examples

1. The Kepler photometer detects that dip in brightness and it records it.

2. It would monitor distant stars with a photometer, looking for transits up to 10,000 au away.

3. It is a photometer, which means it measure brightness.

4. The Kepler space telescope has an instrument called a photometer.