  We describe the possibly measurable difference in the Cherenkov light
component of EAS induced by an electromagnetic particle (e+, e- or gamma) and
induced by a hadron (i.e. proton or heavier nuclei) in TeV range. The method
can be applied in experiments which use wavefront sampling method of EAS
Cherenkov light detection (e.g. THEMISTOCLE, ASGAT).
