Synthesized answer
Bose's method of generating electrical waves of shorter wavelength was crucial because it enabled accurate experimental work that was previously futile with larger, diverging waves [Passage 2, Passage 3]. With short waves, difficulties arising from interference of direct and reflected waves, and the need to shield sensitive receivers from stray radiation were removed [Passage 3]. This allowed for precise angular measurements by directing the electric beam along narrow tubes [Passage 2]. The intensity of the emitted radiation was also moderately strong, which was an advantage, and could be further increased by specific radiator designs [Passage 2].
The use of short electric waves opened new avenues of research, particularly in the study of optical properties of electric waves [Passage 1]. This method allowed for investigations into coherence, polarization, double refraction, and rotation of the plane of polarization [Passage 1]. It also enabled investigations on the polarising action of even small crystals, and the determination of the index of refraction of different substances [Passage 4]. Furthermore, it provided a means to verify the identity of visible and electric radiation…
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From the book
tated by the method introduced by Bose, of generating electrical waves of shorter wave length than those in general use. By this method he obtained important results on coherence, polarization, double refraction and rotation of the plane of polarization which are described in the papers collected in this volume. In addition to the purely physical papers there are others which describe the beginnings of Sir Jagadis' application of physical methods to the study of living matter, a subject to which most of his work in recent years has been devoted. The papers make very agreeable reading for the…
re used. With large waves diverging in all directions and curling round corners, all attempt at accurate work is futile. For angular measurements it is necessary to direct the electric beam in the given direction along narrow tubes, and receive it in another tube in which is placed the receiver. The waves experience great difficulty in passing through narrow apertures, and there are other troubles arising from the interference of direct and reflected waves. All these drawbacks were ultimately removed by making suitable radiators emitting very short waves; the three radiators here exhibited,…
be reflected by the walls of the room or even by the person of the experimenter, and falling on the receiver disturb it. The radiation falling on any portion of the receiving circuit, the leading wires or the galvanometer, disturbs the sensitive receiver. It is extremely difficult to shield the receiving circuit from the disturbing action of stray radiation. All difficulties were, however, successfully removed by the use of short electric waves. With these, it is not at all necessary to take special precautions to shield either the galvanometer or the leading wires, the sensitive layer in the…
ntary portions, of which one is transmitted and the other reflected by the air-film at right angles to the incident ray. When the thickness of air-space is reduced to about 0.3 mm., there is a complete transmission and no reflection. The two prisms in spite of the breach due to the air-space, are electro-optically continuous. A greater separation of the two prisms increases the reflected, at the expense of the transmitted portion; and at a certain critical thickness, there is no transmission but total reflection. If a thin piece of cardboard or any other refracting substance be next…
← On a Self-recovering Coherer and the Study of the Cohering Action of different Metals Collected Physical Papers by Jagadish Chandra Bose On Electric "Touch" and the Molecular Changes induced in Matter by Electric Waves On the Continuity of Effect of Light and Electric Radiation on Matter → First published in the Proceedings of the Royal Society of London , Vol 66. 2218617 Collected Physical Papers — On Electric "Touch" and the Molecular Changes induced in Matter by Electric Waves Jagadish Chandra Bose XIII ON ELECTRIC TOUCH AND THE MOLECULAR CHANGES INDUCED IN MATTER BY ELECTRIC WAVES In…
More questions about this book
- Explain how Bose's discovery of "electric response of non-living matter" exhibiting fatigue, enhancement, and abolition directly served as a foundational argument for his later hypothesis about the physico-chemical basis of living matter's responses.
- How might Bose's assertion of the "essential unity of physiological mechanism in plant and animal life," based on the physico-chemical reactions observed in both living and non-living matter, have challenged prevailing scientific distinctions between the organic and inorganic at the time?
- Trace the conceptual pathway from Bose's early work on the optical properties of electric waves (e.g., polarization, double refraction) to his later investigations into the "electric response" of living tissues. What core principles or methodologies did he carry across these seemingly disparate fields?
- J.J. Thomson highlights Bose's role in the "revival in India, of interest in researches in Physical Science." Beyond his specific discoveries, how might Bose's interdisciplinary approach and emphasis on fundamental unity have shaped the subsequent trajectory of scientific thought or education in India?