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Results tagged with optics
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user 162666
Optics is the study of light, and its interaction with matter. It includes topics such as imaging systems, fiber optics, lasers, quantum optics, and more.
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What is the correct equation for the critical angle of total internal reflection
On Hyperphysics, it says that the threshold index of refraction $n_t$ for some incident angle $\theta_i$ is (in radians);$$
n_isin\theta_i=n_tsin\frac\pi2
$$
but isn't $sin\frac\pi2$ equal to one?
so …
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