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.
Princeton's WordNet(1.00 / 1 vote)Rate this definition: 1  research, search, explore(verb) inquire into. the students had to research the history of the Second World War for their history project; He searched for information on his relatives on the web; Scientists are exploring the nature of consciousness.