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.
2. curious-eager to investigate and learn or learn more (sometimes about others' concerns); a curious child is a teacher's delight; a trap door that made me curious; curious investigators; traffic was slowed by curious rubberneckers; curious about the neighbor's doings.