compensation pyrheliometer वाक्य

उदाहरण वाक्य

1. He focussed his research investigating the radiation of heat from the sun, terrestrial nocturnal emission and its absorption by the Earth's atmosphere, and to that end devised various delicate methods and instruments, including his electric compensation pyrheliometer, invented in 1893, apparatus for obtaining a photographic representation of the infra-red spectrum ( 1895 ) and pyrgeometer ( abt . 1905 ).