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.
interest. 1  the feeling of a person whose attention, concern, or curiosity is particularly engaged by something: She has a great interest in the poetry of Donne. 2  something that concerns, involves, draws the attention of, or arouses the curiosity of a person: His interests are philosophy and chess.