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. n. 1. the sense of curiosity about or concern with something or someone: an interest in butterflies. 2. the power of stimulating such a sense: to have great interest. 3. the quality of such stimulation. 4. something in which one is interested; a hobby or pursuit. 5. (often plural) benefit; advantage: in one's own interest.