photometer

It may also be measured with a photometer lowered into the water.

Photometers are used to determine the correct exposure in photography.

Astronomers said the photometer is used for fewer observations than any other instrument.

The optical depth of the atmosphere can be measured with a sun photometer.

The photometer was used to measure rapid brightness variations in stars.

Historically, a photometer was separate from the camera and known as an exposure meter.

A spectrometer was used, in addition to a photometer.

The photometer measured in the 7 band Geneva photometric system.

The photometer has a soft focus to provide excellent photometry, rather than sharp images.

In filter photometers, optical filters are used to give the monochromatic light.

With a new design of photometer, he was able to measure the exceptionally faint stars in these clusters.

The high-speed photometer, a sensitive light meter, will be able to accomplish only about half of its objectives.

Some photometers measure light by counting individual photons rather than incoming flux.

In modern cameras, the photometer is usually built in.

To make room for the device, the high-speed photometer, an extremely sensitive light meter, would have to be removed.

The photometer will measure the brightness of objects.

His photometer was probably suggested by this appliance.

The photometer will tell which color is ascendent at the expiration of sixty seconds.

Photometers are sensors that do not usually produce images but can read with great accuracy the intensity and duration of light.

The photometer, devised by Beer, is shown below.

This interaction will trigger the bead to emit light, which can be detected using a photometer.

The honey grading machine is basically a photometer, which measures the amount of light absorbed by a substance.

A spectrophotometer is a photometer that can measure intensity as a function of the light source wavelength.

The P7 photometer was active from May 2001 until July 2008.

The photometer also incorporates subdivided chips to produce crude pictures at these wavelengths.