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network:fiber-optics [2022/08/29 09:42] – [Electromagnetic spectrum] mh | network:fiber-optics [2022/08/31 11:02] – [Electromagnetic spectrum] mh | ||
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<WRAP round info> | <WRAP round info> | ||
- | **The speed of light in free space is 3.10⁸m/ | + | **The speed of light in free space is $c = 3.10⁸ |
Fiber optics propagate light using the **[[https:// | Fiber optics propagate light using the **[[https:// | ||
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<WRAP round tip> | <WRAP round tip> | ||
- | $\lambda=\frac{1}{f}$ and $f=\frac{1}{\lambda}$ where $\lambda$ is wavelength ($nm$) and $f$ is frequency ($Hz$) | + | $\lambda=\frac{c}{f}$ and $f=\frac{c}{\lambda}$ where $\lambda$ is wavelength ($nm$) and $f$ is frequency ($Hz$) and $c$ is the speed of light (approx. 2.10⁸ m/s) |
**As wavelength increases, frequency decreases.** | **As wavelength increases, frequency decreases.** | ||
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==== Electromagnetic spectrum ==== | ==== Electromagnetic spectrum ==== | ||
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+ | {{network: | ||
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<WRAP round tip> | <WRAP round tip> | ||
- | **Infra**-red and **Ultra**-violet are prefixed | + | **Infra**-red and **Ultra**-violet are prefixed using **frequency** in mind : |
*infrared has a lower frequency than the red in the visible spectrum (thus a higher wavelength) | *infrared has a lower frequency than the red in the visible spectrum (thus a higher wavelength) |