MCQ IN COMPUTER SCIENCE & ENGINEERING

Detailed explanation-1: -Radiometry is the science of measuring light in any portion of the electromagnetic spectrum. In practice, the term is usually limited to the measurement of infrared, visible and ultraviolet light using optical instruments. Irradiance is the intensity of light and is measured in watts per square meter.

Detailed explanation-2: -Radiometry is the science of measurement of optical radiation at any wavelength, based simply on physical measurements. Radiant energy cannot be measured quantitatively directly, but must always be converted into some other form such as thermal, electrical, or chemical.

Detailed explanation-3: -The difference between radiometry and photometry is that radiometry includes the entire optical radiation spectrum (and often involves spectrally resolved measurements), while photometry deals with the visible spectrum weighted by the response of the eye.

Detailed explanation-4: -Radiant Flux Radiant flux is the fundamental unit in detector-based radiometry. It is defined as the total optical power of a light source, and is expressed in watts.

Detailed explanation-5: -Radiometry is the measurement of optical radiation, which is electromagnetic radiation within the frequency range between 3×1011 and 3×1016 Hz. This range corresponds to wavelengths between 0.01 and 1000 micrometres (m m), and includes the regions commonly called the ultraviolet, the visible and the infrared.