static Float_t Fresnel (Float_t geV,Float_t p, Bool_t pl ); //deals with Fresnel absorption on PC
static void Hit2Sdi (TClonesArray *pH,TClonesArray *pS);
Bool_t IsLostByFresnel ( ); //checks if the photon lost on Fresnel reflection
static Float_t Fresnel (Float_t geV,Float_t p, Bool_t pl ); //deals with Fresnel absorption on PC
static void Hit2Sdi (TClonesArray *pH,TClonesArray *pS);
Bool_t IsLostByFresnel ( ); //checks if the photon lost on Fresnel reflection