#critical angle

It deals with the flight of projectiles from the muzzle end of the weapon to the target. This is a complicated subject involving parameters such as the shape of the bullet, sectional density, atmospheric conclusions.... #ballistics #forensicballistics

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Total internal reflection and Brewster’s angles

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Total internal reflection

From Snell’s second law we have

\begin{equation}\label{eqn:brewsters:20} \theta_t = \arcsin\lr{ \frac{n_i}{n_t} \sin\theta_i }. \end{equation}

This is plotted in fig. 3.

fig. 3. Transmission angle vs incident angle.

  For the \( n_i > n_t \) case, for example, like shining from glass into air, there is a critical…

Click the link to read more about how #opticalfiber works. #optics #physics #science

Hi, so again, as I was studying some optics I found something that interested me. This time it was optical fiber which is the cable that may be running under your way to work bringing you some interner connection.

Optical fibers are cables that are carrying signal. They are made of two pieces of glass with different indexes of refraction. When electromagnetic radiation (light) travels through…