An instrument for measuring a property of light, especially luminous intensity or flux.
An instrument for measuring a property of light, especially luminous intensity or flux.
光度计用来测量光的性质、尤其是光的强度和通量的仪器
An instrument for measuring a property of light, especially luminous intensity or flux.
光度计用来测量光的性质、尤其是光的强度和通量的仪器