Previous Page...   Printer Version Science Constants - First Radiation Constant for Spectral Radiance 2hc2 Symbol: c1L Value: 1.191042722(93) × 10-16 W m2 sr-1 Category: - Physico-Chemical Constants Description:   [ H O M E ] [ S C I E N C E ] [ M A T H S ] [ A S T R O N O M Y ] [ Download ] [ Shop ] [ Contact ] [ About ]