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A pyrgeometer is a device that measures near-surface infra-red (IR) radiation, approximately from 4.5 μm to 100 μm on the electromagnetic spectrum (thereby excluding solar radiation). It measures the resistance / voltage changes in a material that is sensitive to the net energy transfer by radiation that occurs between itself and its ...
The earliest example of a pyrometer thought to be in existence is the Hindley Pyrometer held by the London Science Museum, dating from 1752, produced for the Royal collection. The pyrometer was a well known enough instrument that it was described in some detail by the mathematician Euler in 1760.
A pyranometer (from Greek πῦρ (pyr) 'fire' and ἄνω (ano) 'above, sky') is a type of actinometer used for measuring solar irradiance on a planar surface and it is designed to measure the solar radiation flux density (W/m 2) from the hemisphere above within a wavelength range 0.3 μm to 3 μm.
Many of us haven’t had to ponder the nuance of tariffs since 9th-grade history class. That is until this election season when President Trump proposed a 10 to 20 percent tariff on all goods ...
Historically, the definition of a scientific instrument has varied, based on usage, laws, and historical time period. [1] [2] [3] Before the mid-nineteenth century such tools were referred to as "natural philosophical" or "philosophical" apparatus and instruments, and older tools from antiquity to the Middle Ages (such as the astrolabe and pendulum clock) defy a more modern definition of "a ...
Peter Stumpp's alleged crimes and execution remain one of the most legendary — and disputed — werewolf trials in history
Cruise stars in the eighth installment along with Ving Rhames, Simon Pegg, Vanessa Kirby, Hayley Atwell, Shea Whigham, Pom Klementieff and Henry Czerny, all of whom reprise their roels from past ...
The number of senses in various categorizations ranges from 5 to more than 20. In addition to sight, smell, taste, touch, and hearing, which were the senses identified by Aristotle , humans can sense balance and acceleration ( equilibrioception ), pain ( nociception ), body and limb position ( proprioception or kinesthetic sense), and relative ...
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