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angle of incidence arrangement atoms axis beam blue bright lines color photography Columbia University corresponding crystal deal depends difference of phase direction dispersion displacement disturbance effect electric elements ether ether waves experiment fact film formula glass green indicated intensity laws of reflection lecture length look magnetic field measured medium ment million million molecules motion moving natural frequency Newton object optic axis optically active parallel pass phenomena photograph plane of incidence plane of polarization plane polarized plate position present Principle of Interference prism problem produce reflection and refraction reflector refractive index right angles rings rotation rotatory power screen second Nicol seen sensitive shadow slit Snell's law spectra spectroscope spectrum speed stellar evolution striking substance suppose theory and observation theory of light thickness things tion vapor various velocity vibrations violet wave of light wave surface Zeeman effect
Page 206 - If it consisted in pression or motion, propagated either in an instant, or in time, it would bend into the shadow. For pression or motion cannot be propagated in a fluid in right lines beyond an obstacle which stops part of the motion, but will bend and spread every way into the quiescent medium which lies beyond the obstacle.
Page 3 - Do not all charms fly At the mere touch of cold philosophy? There was an awful rainbow once in heaven: We know her woof, her texture: she is given In the dull catalogue of common things. Philosophy will clip an Angel's wings, Conquer all mysteries by rule and line. Empty the haunted air, and gnomed mine Unweave a rainbow, as it erewhile made The tender-person'd Lamia melt into a shade.
Page 206 - ... pulses or vibrations of the air, wherein sounds consist, bend manifestly, though not so much as the waves of water. For a bell or a cannon may be heard beyond a hill which intercepts the sight of the sounding body, and sounds are propagated as readily through crooked pipes as through straight ones. But light is never known to follow crooked passages nor to bend into the shadow.
Page 254 - THE PRINCIPLES OF POLITICS FROM THE VIEWPOINT OF THE AMERICAN CITIZEN. By JEREMIAH W. JENKS, LL.D., Professor of Government and Public Administration in New York University.
Page 8 - ... sifted through pure. When, therefore, the light of day surrounds the stream of vision, then like falls upon like, and there is a union, and one body is formed by natural affinity according to the direction of the eyes, wherever the light that falls from within meets that which comes from an external object.
Page 160 - If they enter the channel in such a manner that the elevations of one series coincide with those of the other, they must together produce a series of greater joint elevations ; but if the elevations of one series are so situated as to correspond to the depressions of the other, they must exactly fill up those depressions, and the surface of the water must remain smooth ; at least I can discover no alternative either from theory or from experiment. Now I maintain that similar effects take place whenever...
Page 23 - I know not what the world will think of my labours, but to myself it seems that I have been but as a child playing on the sea-shore; now finding some pebble rather more polished, and now some shell rather more agreeably variegated than another, while the immense ocean of truth extended itself unexplored before me.
Page 8 - ... unlike element it is changed and extinguished, being no longer of one nature with the surrounding atmosphere which is now deprived of fire: and so the eye no longer sees, and we feel disposed to sleep.