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  • Intensity Fluctuations in the H-alpha line caused by Chromospheric mottling 
    Bappu, M. K. V (IETE, 1964)
    Spectra of the H-alpha line obtained with high dispersion and high spatial resolution are used to study some of the characteristics of chromospheric mottling on the solar disk. The fluctuations in intensity, indicated by ...
  • Intensity oscillation in the corona as observed during the Total Solar Eclipse of 29 March 2006 
    Singh, J; Hasan, S. S; Gupta, G. R; Banerjee, D; Muneer, S; Raju, K. P; Bagare, S. P; Srinivasan, R (Springer, 2009-11)
    We obtained the images of the eastern part of the solar corona in the Fe xiv 530.3 nm (green) and Fe x 637.4 nm (red) coronal emission lines during the total solar eclipse of 29 March 2006 at Manavgat, Antalya, Turkey. ...
  • Intensity oscillations and heating of the coronal X-ray bright points from Hinode/XRT 
    Kariyappa, R; Varghese, B. A (EDP Sciences, 2008-07)
    Aims. Our aim is to investigate the intensity oscillations in coronal X-ray Bright Points (XBPs). Methods. We analysed a 7 h long time sequence of the soft X-ray images obtained on April 14, 2007 with a 2 min cadence using ...
  • Intensity oscillations in chromospheric bright points and network elements 
    Kariyappa, R (Springer, 1994-09)
    From a 35-min time series of photographic spectra in the Ca II H-line obtained at the Vacuum Tower Telescope (VTT) of the Sacramento Peak Observatory under high spatial, spectral, and temporal resolution, we have derived ...
  • Intensity profile of light scattered from a rough surface 
    Chatterjee, S; Vani, V. C; Banyal, R. K (Optical Society of America, 2013-08-20)
    We present in this paper, approximate analytical expressions for the intensity of light scattered by a rough surface, whose elevation ξ x; y in the z-direction is a zero mean stationary Gaussian random variable. With ...
  • Intensity variation in sunspots 
    Ananthakrishnan, R (Nature Publishing Group, 1951-08)
    The most conspicuous and readily observed feature of a normal sunspot is a dark central umbra surrounded by a less dark penumbral fringe which, under good seeing conditions, appears to be composed of converging filaments ...
  • Intensity Variation of Photons During the Solar Eclipse 
    Chandole, S. V; Shah, S. S (Tata Institute of Fundamental Research, Bombay, 1980-06)
    The study was aimed to determine the variation of intensity of photons from the Sun during solar eclipse at Aurangabad (altitude 586 meters, latitude 19 degree 5' and longitude 95 degree 24'). It was carried out with the ...
  • Intensity Weighted Noise Reduction in MEMS Based Deformable Mirror Images 
    Roopashree, M. B; Vyas, A; Prasad, B. R (American Institute of Physics, 2011-10)
    The frames captured with a compact, high-resolution, monochrome progressive scan CCD camera, of a continuous facesheet microelectromechanical systems (MEMS) deformable mirror (DM), include unwanted diffractive, background ...
  • Inter-planetary magnetic-field and equatorial ionosphere 
    Sastri, J. H (European Geophysical Society, 1980)
  • Interacting system NGC 7805/6 (Arp 112) and its tidal dwarf galaxy candidate 
    Fu, Zhen-Xing; Sengupta, Chandreyee; Ramya, S; Pradhan, Bikram; Singh, Mridweeka; Misra, K; Scott, Tom. C; Ma, Yin-Zhe (IOP Publishing, 2021-02)
    We present results from our Giant Metrewave Radio Telescope (GMRT) Hi, Himalayan Chandra Telescope (HCT) Hα, 1 m Sampurnanand Telescope (ST) and 1.3 m Devasthal Fast Optical Telescope (DFOT) deep optical observations of ...
  • The interaction principle in radiative transfer 
    Peraiah, A (D. Reidel Publishing Co., 1984-10)
    We describe the interaction principle which is of fundamental importance to the theory of radiative transfer in one-, two-, and three-dimensional geometry. We also describe the practical difficulties associated with this ...
  • Interaction-Free Measurements of the Second Type: Concepts and Proposal for a Feasible Experiment 
    Unnikrishnan, C. S (Springer, 2001-09)
    Wave aspects inherent in quantum physics lead to observable consequences, which are far removed from classical intuition. The possibility of interaction-free measurement is one consequence of quantum wave nature at the ...
  • Interactions of UHE cosmic ray neutrinos with the cosmological neutrino background 
    Sivaram, C; Gandhi, R (International Union of Pure and Applied Physics, 1995)
    Apart from the cosmic microwave radiation background, the standard cosmology predicts a thermal neutrino background with a temperature around 20K. Methods suggested to detect such a background, include anomalous forces ...
  • Interfacial hydromagnetic waves with shear and inclined magnetic fields 
    Satya Narayanan, A; Ramesh, R (Astronomical Society of India, 2002-09)
    The combined effect of non-parallel propagation, steady :flow and inclined magnetic field on the . propagation characteristics of hydromagnetic surface waves is examined. The fluid is assumed to be perfectly conducting ...
  • Interference filter photometry of weak emission lines in CQ Cephei 
    Bappu, M. K. V; Sinvhal, S. D (Taylor and Francis, 1959-08)
  • Interference of the running waves at light bridges of a sunspot 
    Su, J. T; Ji, K. F; Banerjee, D; Cao, W. D; Priya, T. G; Zhao, J. S; Yu, S. J; Ji, H. S; Zhang, M (IOP Publishing, 2016-01-01)
    The observations of chromospheric oscillations of two umbral light bridges (LBs) within a sunspot from NOAA Active Region 12127 are presented. It was found that the running umbral waves with periods of 2.2–2.6 minutes ...
  • Interferometric Eclipse Observations of Coronal Fe XIV Emission 
    Smartt, R. N; Zirker, J. B; Mauter, H. A (Tata Institute of Fundamental Research, Bombay, 1980-06)
    An experiment carried out during the February 16, 1980 total solar eclipse to measure velocities and intensity distributions associated with coronal loops is described. The optical instrumentation used consisted of a 30-cm ...
  • Interior and exterior clues of solar activity 
    Turck-Chièze, S; Brun, A. S; Duez, V; García, R. A; Mathis, S; Piau, L; Salabert, D; Pallé, P. L; Jiménez-Reyes, S. J; Mathur, S; Simoniello, R; Robillot, J. M (Springer, 2010)
    Two research paths are described to obtain better understanding of the origin of global solar activity. First, observations with a multichannel resonant spectrometer may reveal the dynamics of the solar core, the tachocline, ...
  • Intermediate Galactic Latitude Starforming Region-CG 12 
    Maheswar, G; Manoj, P; Bhatt, H. C (Astronomical Society of India, 2002-09)
    Optical linear polarization measurements of stars seen projected towards CG 12, an intermediate latitude (b = 2P .1) starforming cloud, have been made. The results show that the polarization vectors of the majority of the ...
  • Intermediate Galactic Latitude Starforming Region-CG 12 
    Maheswar, G; Manoj, P; Bhatt, H. C (Astronomical Society of India, 2002-09)
    Optical linear polarization measurements of stars seen projected towards CG 12, an intermediate latitude (b = 2P .1) starforming cloud, have been made. The results show that the polarization vectors of the majority of the ...

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