Refraction Of Light Video Lessons

Concept

# Problem: Light will almost always travel from one place to another along a path of leastA. distance.B. time.C. effort.D. expense.E. complication.

###### FREE Expert Solution

In this problem, let's consider a path r joining two points A and B.

The length of the optical path is defined by the line integral:

$\overline{){\mathbf{l}}{\mathbf{=}}{{\mathbf{\int }}}_{{\mathbf{r}}}{\mathbf{n}}{\mathbf{d}}{\mathbf{s}}}$.

In this case, n is the refractive index and ds is the differential element of length.

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###### Problem Details

Light will almost always travel from one place to another along a path of least

A. distance.

B. time.

C. effort.

D. expense.

E. complication.