1.

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

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


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