question: Planck 's law involved what necessary mathematical step to correctly predict blackbody emission ?
answer: multiply the classical expression by a complex factor that involves h in both the numerator and the denominator
turker_answer: Blackbody emission can be correctly predicted by multiplying the classical expression by a complex factor that involves h in both the numerator and the denominator .
rule-based: Planck 's law involved multiply the classical expression by a complex factor that involves h in both the numerator and the denominator necessary mathematical step to correctly predict blackbody emission .