Sentence examples for photometer from inspiring English sources
noun
Any of several instruments used to measure various aspects of the intensity of light.
To measure the light produced by it, he developed the grease-spot photometer (1844).
Joly is also noted for his inventions of a thermometer, a steam calorimeter for measuring heat energy, and a photometer for measuring light frequencies.
Gaia also carries a photometer to measure the brightness of astronomical objects and a spectrometer to measure the velocities of those objects.
It is equipped with five principal scientific instruments: (1) a wide-field and planetary camera, (2) a faint-object spectrograph, (3) a high-resolution spectrograph, (4) a high-speed photometer, and (5) a faint-object camera.
The submarine photometer records directly to depths of about 150 metres the infrared, visible, and ultraviolet portions of the spectrum.
Spitzer carried an 85-cm (33.5-in) primary mirror that focused infrared light on three instruments—a general-purpose infrared camera, a spectrograph sensitive to mid-infrared wavelengths, and an imaging photometer taking measurements in three far-infrared bands.
IRAS was succeeded in 1995 98 by the European Space Agency's Infrared Space Observatory, which had a 60-centimetre (24-inch) telescope with a camera sensitive to wavelengths in the range of 2.5 17 micrometres and a photometer and a pair of spectrometers that, between them, extended the range to 200 micrometres.
The 60-cm (24-inch) telescope had a camera sensitive to infrared radiation at wavelengths in the range of 2.5 17 micrometres and a photometer and a pair of spectrometers that, between them, extended the range out to 200 micrometres.
This is carried out with a special instrument called the flicker-photometer.
Photometers are made in many forms for various applications.
By the 1930s both the selenium cell and the copper oxide cell were being employed in light-sensitive devices, such as photometers, for use in photography.
