Category: Science - Physics
+Similarity of Heat and Light.+--That light and heat have essentially the same characters is very soon made evident. Both light and heat travel to us from the sun across the ninety odd millions of miles of space unoccupied by any material.
In this concluding chapter it is proposed to show how the wave-lengths of radiant heat have been determined and to state what range of wave-lengths has been experimentally obser...
5. CHAPTER V+The Full Radiator.+--We have assumed that a lamp-blacked surface is a perfect absorber, and consequently a full radiator, but although it is a very near approach to the ideal i...
1. CHAPTER I+Similarity of Heat and Light.+--That light and heat have essentially the same characters is very soon made evident. Both light and heat travel to us from the sun across the nin...
7. CHAPTER VII+Prediction of Pressure by Maxwell.+--Had the fact that light exerts a pressure been known in Newton's time there is no doubt that it would have been hailed as conclusive proof...
3. CHAPTER III+The Spectrum. Dispersion.+--When a narrow beam of white light is transmitted through a prism of glass or of any other transparent substance, it is deflected from its original d...
6. CHAPTER VINo account of radiation would be complete without mentioning what becomes of the radiation which bodies absorb, but a good deal of the subject is in so uncertain a state that ve...
4. CHAPTER IV+Absorbing Power.+--A perfectly dull black surface is simply one which absorbs all the light which is falling on it and reflects or diffuses none of it back. If the surface abso...
2. CHAPTER IIA system of ripples on the surface of water appears in vertical section at any instant somewhat as in Fig. 10. The dotted line AB represents the undisturbed surface of the wafer...