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Query was: light

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• Title: Cover: First Scientific Lecture-Course
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  • First Scientific Lecture-Course: Light
• Title: Foreword: First Scientific Lecture-Course
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  • light of spiritual knowledge, and we who have received this
• Title: First Lecture (First Scientific Lecture-Course)
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  • shall at most be able to contribute a few side-lights which may help
  • “ether” or the like, as underlying the phenomena of light
  • justified to say that when we perceive a phenomenon of light or
  • light or colour for example, the objective wave-movement in the
  • light will interact with matter that is in its path. Goethe puts into
  • words how light and matter interact. That is no “law”; it
  • considerable light on what is seeking to come into our Science by way
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• Title: Second Lecture (First Scientific Lecture-Course)
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  • of light and colour rather as follows: — We ourselves are
  • affected, say, by an impression of light or colour — we, that
  • about the phenomena of light, you will find contradictory and
  • only happens to a slight extent we can still bear it; if to a great
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  • on that side. By immersion in water the object has become lighter,
  • — it loses some of its weight. We can test how much lighter it
  • balance. We find the object has become lighter to the extent of the
  • body becomes as much lighter as is represented by the weight of
  • is lightened, leaving only about 20 grammes. What does this signify?
  • exception of the spinal cord — are only to a very slight extent
  • on the other hand becomes light and clear inasmuch as we are able to
  • Will in matter and on the other hand the lightening of Will into
  • then see upon the one hand the lightening into Intelligence, brought
  • which comes about when we open our eyes and are in a light-filled
  • with pressure. When we expose ourselves to light, insofar as the
  • light works purely and simply as light, not only do we lose nothing
  • it at all, can fail to perceive that by exposing himself to the light
  • unite with what comes to meet us in the light; we shall discuss this
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• Title: Third Lecture (First Scientific Lecture-Course)
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  • and by. We shall have to go into the phenomena of light and colour
  • explain is in its essence a special kind of interplay of light and
  • dimming or clouding of the light. I was trying to show how through
  • the diverse ways in which light and dark work together —
  • induced especially by the passage of a cylinder of light through a
  • treatment of light and colour. The strange education we are made to
  • light and colour, let us now begin again, but from the other end. I
  • light came to his notice. Among other things, he learned of the
  • colourless light go through a prism the colourless light is analyzed
  • we let a cylinder of colourless light impinge on the screen, it shows
  • light, the physicists went on to say, we get the sequence of colours:
  • red, orange, yellow, green, blue — light blue and dark blue,
  • explain it thus, so he was told — The colourless light already
  • make the light go through the prism, the prism really does no more
  • than to fan out and separate what is already there in the light,
  • so: If then the light is analyzed by the prism, I shall see it so on
  • yonder wall. He really expected to see the light in seven colours.
  • the stain, the dark and clouded part, met the lighter surface.
  • If we let light pass
  • Put a prism in the way of the body of light that is going through
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• Title: Fourth Lecture (First Scientific Lecture-Course)
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  • follows: When I look through darkness at something lighter, the light
  • light colours, i.e. in the direction of the red and yellowish tones.
  • white — at any whitish-shining light through a thick enough
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  • water through which you send a stream of light so that the liquid is
  • illumined, you will be looking at the dark through something light.
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  • Ur-phenomenon: Light through dark — yellow; dark through light
  • sent a cylinder of light through a prism and so obtained a real scale
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  • cylinder of light, the light in some way goes through the prism and
  • path of the light — that is, a body with convergent faces. In
  • passing through the prism, the light gets darkened. The moment we
  • send the light through the prism we therefore have to do with two
  • things: first the simple light as it streams on, and then the dimness
  • interposed in the path of the light. Moreover this dimness, as we
  • said, puts itself into the path of the light in such a way that while
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• Title: Fifth Lecture (First Scientific Lecture-Course)
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  • solid body spreads its light and we let this light go through a
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  • obtain a luminous picture with the light that spreads from a glowing
  • light or little bands of light at different places, according to the
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  • light above all in 1859 by the famous experiment of Kirchhoff and
  • Bunsen. If we arrange things so that the source of light generating
  • quality of light which would be appearing at this place (i.e. in the
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  • must be at least equal to the strength of light that is just being
  • apparatus, we here generate the cylinder of light; we let it go
  • on to the screen. Into the path of the cylinder of light I place a
  • path of the cylinder of light the solution of iodine in carbon
  • disulphide, this light is extinguished. You see the spectrum clearly
  • that I cause the light to go through this solution — iodine in
  • relation to the light? How do they, simply by dint of their material
  • existence so to speak, develop such relation to the light that one
  • say: When colourless sunlight — according to the physicists, a
  • “phosphores” or light-bearers. This is what they meant:
  • exposed this to the light, a strange phenomenon occurred. After
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• Title: Sixth Lecture (First Scientific Lecture-Course)
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  • in the realm of light, it will also help us observe and understand
  • illustrated in the realm of Light.
  • phenomena of light in rather recent times, historically speaking.
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  • it diagrammatically, let me represent the latter simply by a light
  • through the glass? You were no doubt told that rays of light proceed
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  • the direction of the “ray” I am now drawing, the light
  • without the glass. Now this is said to be due to the light being
  • When the light passes from a more tenuous into a denser medium, to
  • find the direction in which the light will be refracted, you must
  • the light went on its way without being hindered by a denser medium,
  • it would go on in this direction. But, they now say, the light is
  • light” is seen through the denser medium.) Here then again, at
  • If the light went straight on it would go thus: but at this second
  • said to produce the final direction of the ray of light and thus to
  • glass. Here, to begin with, the light impinges on the plate, then it
  • ascribe this faculty ....) the light is somehow projected out into
  • discriminate, however delicately, between the darker and lighter
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• Title: Seventh Lecture (First Scientific Lecture-Course)
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  • that wherever colours arise there is a working-together of light
  • true conception of what underlies this interplay of light and
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  • VIIa), — candles as sources of light — and an
  • left-hand source of light. It is produced, in that the light from
  • arises where the light from the right-hand source is covered.
  • is illumined by both sources of light. Now I will colour the one
  • (the left-hand) light. I make the light go through a plate of
  • coloured glass, so that this one of the lights is now coloured
  • that the shadow of the rod, due to this left-hand source of light
  • source of light to red, you see the shadow green. What was mere
  • source of light to green, — the shadow becomes red. And when
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  • shadows. I darken this source of light and get green, said Goethe
  • I darken this source of light, the white screen as a whole shines
  • with colour. The light and darkness then work together in a
  • different way. We note that by darkening the light with red the
  • physical apparatus. This physical apparatus, mingling light and
  • by the red darkening of the light, and the green afterimage,
  • descend from Light to Warmth. Warmth too we perceive as a condition
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• Title: Eighth Lecture (First Scientific Lecture-Course)
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  • at some distance from you, you see the flash of light in the
  • thunder after you see the lightning. If you neglect that there is
  • such a thing as a velocity of light, you may then call the time
  • that elapses between your perception of the impression of light and
  • then put a very light and mobile dust into the tube that is filled
  • to apply to the phenomena of sound and light? This surely would be
  • sensations of light and sound are so. None of you are there outside
  • light and sound the inner life and being which you experience in a
  • Just as the light affects the eye and the optic nerve receives the
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  • of light. Having begun with the mistaken premise that eye and ear
  • eye and the phenomena of light. What comes into our consciousness
• Title: Ninth Lecture (First Scientific Lecture-Course)
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  • enabling us to throw some light on the educational use of
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  • akin to the light that spreads through space, — the latter
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  • Figure IXb — were a source of light and here a mirror. A
  • cylinder of light is reflected, this is then gathered up again by a
  • second mirror, and an image arises here. We may then say, the light
  • generally imagines wave-movements to spread out. Even as light
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  • extent. For sound and light, they were imagining wave-trains,
  • Hertz's discoveries were still the twilight of the old, tending as
  • the green light on the glass; that is fluorescent light. I am sorry
  • they thought of light for instance being propagated in the form of
  • the body of light that is going through this tube — this
  • fresh experiments now came to light, which in their turn seemed
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  • velocity of light, while the velocity of the α-rays is
  • about one-tenth the velocity of light. We have therefore these
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• Title: Tenth Lecture (First Scientific Lecture-Course)
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  • as we have seen, the phenomena of light had been brought into a
  • the raying light itself something like radiating electricity. I do
  • object, as we should do with light. Light throws a shadow. So do
  • to meet them, giving a greenish light. The velocity of the canal
  • greenish-yellow, fluorescent light. The rays that shew themselves
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  • of light, colours could be seen arising, but man had not enough
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  • and algebraic too) to the phenomena of light or sound, then in your
  • the wave-theory of light, or Newton's corpuscular theory, —
  • when you connect it with the phenomena of light. What you then do
  • different when we go down from the phenomena of light and sound,
  • tubes makes itself known to us in phenomena of light, etc. Whatever
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  • way. The phenomena of sound and tone and light are akin to the
  • intermediate between light and sound on the one hand, electricity
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