1.

Relation between gradient of refractive index with height and dielectric constant gradient is ____________

A. ( frac{d _r}{dH}=2n frac{dn}{dH} )
B. ( frac{d _r}{dH}=n frac{dn}{dH} )
C. ( frac{d _r}{dH}=2n/ frac{dn}{dH} )
D. ( frac{d _r}{dH}=-2n frac{dn}{dH} )
Answer» B. ( frac{d _r}{dH}=n frac{dn}{dH} )


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