Chapter 23. Index of refraction (23-5)

Question

3FmgbN7hoNpuqRkWdcMBS7cA7jvP/t3mTyBWwFbGSbx1N3H0
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Question

KkdbBAMj8I9lsfJU3hPMWu+PraJUhQmJp/925Q==
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Question

uDsOPxCL/ypHZOdBAfuHu1j++8hDWwoGvVB6grmVCo8=
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Review

The index of refraction of vacuum is 1, since light travels at the speed of light \(c\) so \(v = c\) and \(n = c/c = 1\). In any material medium, light travels slower than \(c\), so \(v < c\) and \(n > 1\). The greater the value of the index of refraction \(n\) in a given medium, the slower the speed \(v\) at which light propagates in that medium. Table 23-1 lists the index of refraction of some common materials. Note that the index of refraction of air is equal to one to three significant digits, so we’ll often take \(n_{\mathrm{air}} = 1\) in calculations.