15. Metallic crystal possesses :
(a) High optical reflection and absorption coefficient
(b) Good conducting property due to the presence of free electrons
(c) Opaque to all electromagnetic radiations from low frequency to the middle ultraviolet
(d) All of theseSubject Name : Electronics Engineering Exam Name : IIT GATE, UPSC ESE, RRB, SSC, DMRC, NMRC, BSNL, DRDO, ISRO, BARC, NIELIT Posts Name : Assistant Engineer, Management Trainee, Junior Engineer, Technical Assistant Electronics & Communication Engineering Books
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