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.
uk â /ÉªnËtriËÉ¡/ us â /ÉªnËtriËÉ¡/. âº to interest someone a lot, especially by being strange, unusual, or mysterious: Throughout history, people have been intrigued by the question of whether there is intelligent life elsewhere in the universe. Thesaurus: synonyms and related words. Making people excited and interested. absorbed.