Radiometric instruments are devices used to measure the intensity of radiation, typically in the form of electromagnetic waves. These instruments can detect various types of radiation, including gamma rays, X-rays, and infrared radiation. They are essential in fields such as nuclear physics, environmental monitoring, and medical imaging. Common types of radiometric instruments include photometers, which measure light intensity, and spectrometers, which analyze the spectrum of radiation. These tools help scientists and researchers understand radiation levels, identify materials, and assess environmental conditions, contributing to safety and research advancements in multiple disciplines.