Question

photographic photometry​

Answer 1

Answer:

Photometry, from Greek photo- ("light") and -metry ("measure"), is a technique used in astronomy that is concerned with measuring the flux or intensity of light radiated by astronomical objects. ... Standard sets of passbands (called a photometric system) are defined to allow accurate comparison of observations.

Explanation:

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Answer 2

Answer:

PHOTOGRAPHIC PHOTOMETRY

Explanation:

A FORM OF PHOTOMETRIC MEASUREMENT OFTEN USED WITH LIGHT SOURCSES THAT ARE TRANSPARENT OR FLUCTUATING ,IN WHICH A PHOTOGRAPHIC PLATE IS USED TO OBTAIN A RECORD OF A SOURCE RELATIVE INTENSITIES OVER DIFFERENT PARTS OF ITS EMMITANCES.