Definitions for "Radiometer"
An instrument designed for measuring the mechanical effect of radiant energy.
An instrument to measure the changing levels of radiation as well as visible and infrared light. They can produce cloud images even at night.
a device that detects and measures electromagnetic radiation.
Keywords:  forestaff
A forestaff.
a pinwheel with paddles that are painted either black or white
A radiometer is a device for determining the penetrative power of x-rays; also called a roentgenometer.
Keywords:  mast, bulb, sphere, glass, vacuum
a glass tube that is a partial vacuum
a large glass bulb or sphere with a mast running up the middle
Keywords:  degrade, tool, necessary, age, sources
a necessary tool since UV light sources degrade with age