A.光線從光密媒質(zhì)向光疏媒質(zhì)入射,i≥ic B.光線從光疏媒質(zhì)向光密媒質(zhì)入射,i≥ic C.光線從光密媒質(zhì)向光疏媒質(zhì)入射,i≤ic D.光線從光疏媒質(zhì)向光密媒質(zhì)入射,i≤ic
A. B. C. D.
A.極大值 B.極小值 C.恒定值 D.任意值