Question: (A) (B) (D) A Pb-Sn sample of eutectic composition, containing a- and B- phases, is examined in a scanning electron microscope. The a-phase contains

(A) (B) (D) A Pb-Sn sample of eutectic composition, containing a- and

(A) (B) (D) A Pb-Sn sample of eutectic composition, containing a- and B- phases, is examined in a scanning electron microscope. The a-phase contains ~97 wt% Pb (atomic number 82) while -phase contains ~99 wt% Sn (atomic number 50). The ratio of number of backscattered electrons escaping from a-phase to that from -phase would be: Less than 1 Equal to 1 Greater than 1 Equal to 0

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