EntityQ2280060· pop 9· linked from 54 articlesspectral indexSign in to savemeasure of the dependence of radiative flux density on frequency (astronomical term)ConnectionsastronomyEntityInternational Standard Book NumberEntityfrequencyEntitylogarithmEntitywavelengthEntitythermal radiationEntitypartial derivativeEntitysynchrotron radiationEntityWien's displacement lawEntitycolor indexEntityRayleigh–Jeans lawEntitypower lawEntityWolfram ResearchCompanyjanskyEntitysign conventionEntityradiative fluxEntityCategoriesEquations of astronomyRadio astronomy