Gregg, J. B. [from old catalog] · Ada, Ohio, The University herald press · leaf 79
he candlepower with the glass over the orifice; (3.) A, the per cent oflight absorbed. Di : D\ :: C, : Q.(C\ — C9)+C=A. 68 LIGHT. EXPERIMENT 31, REFLECTION AND REFRACTION. Method*—1. Reflection. Pass a ray of light through theopening in the center of the reflection apparatus, and changethe mirror…
Physics
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