## Laser Tattoo Removal?! It’s Like A SKIN ERASER!

First — no, I’m never getting my tattoos removed, and yes, I plan on getting both sleeves! Â A friend sent me a link, and boom — there was a dude getting his tattoos removed. Â Take a moment and check this out, it is actually quite amazing:

Whoa.

This process of laser tattoo removal is called laser ablation, or even better — selectiveÂ photothermolysis. Â That’s certainly a five dollar word, isn’t it? Â If you break it down it’s pretty simple: Â photo means light, thermo means heat, and lysis means destruction. Â So destruction using light and heat. Â Can you dig it? Â To put this into perspective of, say, the entertainment industry, laser ablation is used to make glass and/or metal gobos, and can be done with ridiculous precision. Â Ridiculous. Â Laser Ablation is something that typically uses a pulsed laser because of its high power; when something is laser ablated, the power and temperature is usually at such a magnitude that the material being removed is often plasma-fied or just vaporized altogether.

Wanna get really nerdy with me? Â I also checked out a paper called Optimizing Outcomes of Laser Tattoo Removal, talking about different wavelengths and laser types. Â Yes, it’s interesting!

Hey, did I mention that video above has a guy basically getting his tattoos erased?!

Thanks, LikeCool!Â

## Jim’s New Tattoo – June 24!

I decided recently that the time to wait to get any more tattooing has passed. The guy who did my first tattoo is coming back to Oklahoma City on June 24, and I have an appointment to get some more equations!

So far, I have the Law of Reflection and Snell’s Constant – each of the equations on my arm are separated by a semicolon. Â Each additional equation will be separated by a semicolon as well. Â Here’s the first one:

I’ve decided that this next round will be several equations. Â First, the Lorentz force exerted on charged particles, from classical electromagnetism:

(Try to ignore the blue lines, they are guides for me to line up symbols in Photoshop)

Next in line is the Lensmaker’s Equation:

After that will be all four of Maxwell’s Equations, starting with Gauss’ Law:

Of course next will be Gauss’ Law for Magnetism (no monopoles, mophos!):

Followed by the Maxwell-Faraday equation explaining induction:

Last but not least or final – Ampere’s Law with Maxwell’s correction:

I am so freaking excited!!!

## If You Were Going to Get a Tattoo…

I’ve been pondering over the last few years the idea of getting a tattoo of something related to light or lighting.Â  I’ve never had a tattoo before, and I’d probably get something small on my shoulder or chest.Â  I’ve thought about something simple, like the Law of Reflection (Ai = Ar), or something complex and colorful.

What are your thoughts on a “lighting-inspired” tattoo?Â  I’m open to any suggestions, post in the comments!