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A multimode, step-profile fibre has a core radius of 50 microns, a core index of 1.52 and a cladding index of 1.50.
(a) If the fibre end-face is excited by a source with a wavelength of 850nm, what is the maximum number of bound modes that can be excited?
(b) What is the minimum number of bound modes that will be excited regardless of the wavelength of the source?
(c) If the fibre in (a) is now illuminated simultaneously by 2 sources that emit light at wavelengths of 1,300 and 1,550nm, respectively, what is the total number of different modal states that can be excited?
A charge q of mass m starting from rest is allowed to move between two plates having a potential difference of V volt. Determine the final velocity of it? Repulsion is the sure
Determine the HVL of photons in air, water, muscle, bone, and Pb for energies of 5 keV, 100 keV, 1 Mev and 100 MeV and then fill in the table below. Note that you must find the HVL
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It is a parameter of an insulator that defInes the maximum voltage difference that can be applied across the material before the insulator collapse and conducts.
Obtain expression for an optical path difference for formation of circular fringe in Michelson''s interferometer
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give brief detail of heat loss in cylindrical pipe
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