Energy and Frequency. Planck showed how the energy of a quantum of light is related is related to its frequency. He defined a constant, known as Planckâs constant, which, when multiplied by the frequency of a light quantum, gives its energy.
curiosity noun (INTEREST). B2 [U] an âeager âwish to âknow or âlearn about something: to âarouse/âexcite/âsatisfy someone's curiosity I'm âburning with curiosity-you must âtell me who âwon! She âdecided to âcall her ex-boyfriend out of curiosity.
A curiosity is something that is unusual, interesting, and fairly rare. There is much to see in the way of castles, curiosities, and museums. Reed International is a curiosity in the international world of publishing. Synonyms: oddity, wonder, sight, phenomenon More Synonyms of curiosity. 3. curiosity killed the cat.