Definitions of radiometer

n meter to detect and measure radiant energy (electromagnetic or acoustic)

Crookes radiometer
electromagnetic radiometer consisting of a small paddlewheel that rotates when placed in daylight
radiometer that is extremely sensitive
Rayleigh disk
an acoustic radiometer consisting of a light disk suspended from a quartz thread; when exposed to a progressive sound wave its torque can measure velocity
Type of:
any of various measuring instruments for measuring a quantity

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