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[citation needed] Sheets of amorphous selenium convert X-ray images to patterns of charge in xeroradiography and in solid-state, flat-panel X-ray cameras. [91] Ionized selenium (Se+24, where 24 of the outer D, S and P orbitals are stripped away due to high input energies [ clarification needed ] ) is one of the active mediums used in X-ray lasers.
By 1901, it could detect radiation from a cow from 400 metres away and was sensitive to differences in temperature of one hundred thousandths (0.00001 C) of a degree Celsius. [ 47 ] [ 48 ] The first commercial thermal imaging camera was sold in 1965 for high voltage power line inspections.
The scale is an absolute temperature scale with the same increment as the Celsius temperature scale, which was originally defined according to the boiling point (set to 100 °C (212 °F)) and melting point (set to 0 °C (32 °F)) of water.
Montreal [a] is the largest city in the province of Quebec, the second-largest in Canada, and the ninth-largest in North America.It was founded in 1642 as Ville-Marie, or "City of Mary", [19] and is now named after Mount Royal, [20] the triple-peaked mountain around which the early settlement was built. [21]