In the next chapter, Eq. (4.47), well see that a substance reflects radiant energy appreciably when its

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In the next chapter, Eq. (4.47), we€™ll see that a substance reflects radiant energy appreciably when its index differs most from the medium in which it is embedded.

п, — п; [Jo,==o = [-r, lo,=o (4.47) n, + n;

(a) The dielectric constant of ice measured at microwave frequencies is roughly 1, whereas that for water is about 80 times greater€”why?

(b) How is it that a radar beam easily passes through ice but is considerably reflected when encountering a dense rain?

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Optics

ISBN: 978-0133977226

5th edition

Authors: Eugene Hecht

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