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Raychaudhuri, Probhas
- Laser Photons And Their Interactions
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1 Department of Applied Mathematics, Calcutta University, Calcutta 700 009, IN
1 Department of Applied Mathematics, Calcutta University, Calcutta 700 009, IN
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Indian Science Cruiser, Vol 7, No 3 (1993), Pagination: 18-27Abstract
Few theories which have been put forward to understand the interaction of laser radiation with matter are discussed. Among them is highlighted the Effective Photon hypothesis which suggests a modification of classical photon energy. The 'Effective Photon' formula becomes operative only when the photon number density becomes higher than the ordinary photon. It appears to be useful in understanding the nature of interaction of high intensity photon (such as laser, maser) beams with atoms, molecules and gases. Some process by which such effective photons may be detected is mentioned. It is suggested that multiphoton absorption process in chemistry may be due to broadening of photon energy distribution in the effective photons.- Comets and their Origins
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1 Department of Applied Mathematics Calcutta University, Calcutta - 700 009, IN
1 Department of Applied Mathematics Calcutta University, Calcutta - 700 009, IN
Source
Indian Science Cruiser, Vol 13, No 4 (1999), Pagination: 26-32Abstract
Cosmic bodies appear before our eyes ami disappear to reappear — may be, in next 100 years or even after 1000 years : What an) these bodies? Are they members of our solar family? Where is tht; source of their origin?Keywords
No Keywords- Anomalous Components of Cosmic Rays and Pulsation of Solar Core
Abstract Views :130 |
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Authors
Affiliations
1 Department of Applied Mathematics, Calcutta University, Calcutta - 700 009, IN
1 Department of Applied Mathematics, Calcutta University, Calcutta - 700 009, IN
Source
Indian Science Cruiser, Vol 8, No 3 (1994), Pagination: 20-23Abstract
The anomalous component of cosmic rays is important because it (i) reveals a large acceleration region in the outer hcliosphere, (ii) provides the opportunity to obtain the composition of neutral elements in the VLISM and (iii) indicates features of solar modulation. In this paper we suggest that the anomalous component of cosmic rays are those of interstellar neutrals which enter the solar system due to the solar core pulsation. The interstellar neutrals enter the solar system during the contraction of the solar core after the sunspot maximum has ceased (during this time solar core attracts interstellar neutrals into the solar system). Thus the interstellar neutrals enter the solar system not solely due to the sun's motion relative to the galaxy as proposed by Fisk et al. Solar modulation of anomalous cosmic rays can also be explained in this idea.xReferences
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