The wavelength at which the monochromatic magnitude of a star is equal to its magnitude measured through a broad-band filter. It varies with the colour of the star and with the amount of atmospheric extinction.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。