Photometer is an optical device which is used to compare the power of illumination or luminous intensities of two light sources. In the market, we can see variety of photometers. The convenient and precise with maximum accuracy can expect from the following photometers-Lummer-Brodhum photometer, Flicker photometer and photovoltaic photometer. The Lummer-Brodhum photometer limits its application to monochromatic spectrum. i.e., it cannot be used when light sources emit different colour light. Flicker photometer is having same problem but in this case accuracy is more. These photometers are also can be used for the verification of inverse square law of light and sometimes as photocell.
No comments:
Post a Comment