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In presence of matter the possibility of flavor oscillation of masslessneutrino is explored. A comparison between vacuum oscillation and the matterinduced oscillation of massless neutrinos is carried out to examine whether theflavor transition is possible in the framework of standard model if there isbackground matter. The Stodolsky type of equation describing the neutrinooscillation phenomenon as the motion of a spherical pendulum in flavor space isdeduced. That pendular model is studied with zero vacuum oscillation frequencyimplying the zero neutrino mass evolved in the framework of standard model, butnon-zero frequency arising due to the MSW effect. The implication of thenon-zero term present in the Stodolsky equation at zero vacuum frequency isaddressed properly.

Can massless neutrinos oscillate in presence of matter?