Simply by observing the existence of the Cherenkov radiation from a particle, one can determine its relative velocity with respect to the light speed in medium. Knowing that, one can determine the particle momentum.
It is a ring formed carbon skeleton. The smallest possible cyclic hydrocarbon is cyclopropane (triangular C3H6) together with cyclobutane both being rather unstable (degration to linear propene and 1-butene). Five and six membered rings are quite common.
Polycyclic aromatic hydrocarbons (PAHs, also polyaromatic hydrocarbons) are hydrocarbons â organic compounds containing only carbon and hydrogenâthat are composed of multiple aromatic rings (organic rings in which the electrons are delocalized).olycyclic aromatic hydrocarbons (PAHs, also polyaromatic hydrocarbons) are hydrocarbons â organic compounds containing only carbon and hydrogenâthat are composed of multiple aromatic rings (organic rings in which the electrons are delocalized).