what is the meaning of light power
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a quantity permitting comparison of illuminances in the image planes of various optical systems. When the geometric light power is multiplied by the coefficient τ, which characterizes the losses, the physical, or effective, light power is obtained. ...
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a quantity permitting comparison of illuminances in the image planes of various optical systems. When the geometric light power is multiplied by the coefficient τ, which characterizes the losses, the physical, or effective, light power is obtained. ...
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