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.
Curious children gather around photographer Toni Frissell, looking at her camera. Curiosity (from Latin curiosus careful, diligent, curious, akin to cura care) is a quality related to inquisitive thinking such as exploration, investigation, and learning, evident by observation in human and animal species.