#5mw

El uso de Punteros láser verdes para la divulgación de la astronomía

En esta entrada os voy a hablar de una herramienta muy usada por educadores y divulgadores para apoyarse y hace más espectacular sus actividades divulgativas y de enseñanza de la astronomía, los punteros láser verdes. También hablaremos de cómo usarlos con seguridad y los peligros que indudablemente tienen. Los punteros láser verdes son ayudas didácticas eficaces para presentar al público el…

Raindrops falling on white downy feathers. The tendons stretch in an unfamiliar fashion— the first offering of shelter the angel had ever made.

Well, maybe not. The gift of the sword was a shelter of sorts, a boon to the exiled couple as they made their way into the sandy wilds of the world that was not Eden. A shelter. Sort of.

Physically, though, his offering of a covering for his conversational partner was a new instinct. He supposed he should thank the Almighty for letting his wing contort in that way. He doesn’t know if any of his siblings had ever attempted it before. Love was their nature, but compassion, he was beginning to think, was not something they all had in common.

There were no words said about the protection from the first rain. Maybe, in about six thousand and some odd years, maybe there would be. Maybe. But right now, it just feels natural. It feels good. It feels right. For both parties involved.

The other, the demon, didn’t think much of it. In hindsight, the motion was a surprise, another reason to delve into every following interaction between the two as their relationship changed, and deepened, and bettered. But in the moment, well. He did remember what love felt like, believe it or not. And this felt like… anyway.

“Maybe.” Taako voice lilted, high, high above Barry’s head. He found he couldn’t make himself look into his brother’s eyes; the sun or the salt or the shame blinded him. Barry tightened his grip on the side of Taako’s board and stared far away.

“Maybe.”

He let go. Barry ducked below the waves in one swift movement, eyes closed, and he started to swim. He thought he was sinking, at first, thought he was dying— but his muscles moved like someone else was piloting his body, like a possession, like maybe Taako was a better teacher than he’d given credit for— and by himself, Barry pushed onwards, traveling under the water back to the shore. He opened his eyes. The sandbed was far below him— they’d stayed out past high tide, he lightly realized— and the floor was a mesmerizing carpet of shifting sands and conspicuous corals. He saw fuschia, vermillion, a lime green so vivid it caught the filtered sun through the water and shone. He saw his own shadow, cast against the great rocks, distorted and unfamiliar.

...for a gift. Wanted a nice, strong 5mw laser that would show a visible beam for stargazing.

...it’s harder to find these at affordable prices than you might think. Due to regulations, some companies just outright refuse to sell in the US, and... Well, that’s neither here nor there.

Still I did buy my miniature magnets at Banggood.com, which also has the 300-series lasers that are sold for pennies all about the internet.

What could go wrong?

...turns out it’s a good thing the lasers are cheap, as quality varies greatly. This is all three at once, and I can forgive you if you think there’s only two.

The YL-303 is an absolutely miserable laser. You can pick up a keychain laser at any gas station with more power than this. Plus, the YL-303 is apparently -supposed- to be a China-only product, as is ships with the C-type outlet charger, and all warnings are in Mandarin.

Why it’s on the storefront - much less ships to America - is a mystery to me.

Oh, and this is the second one. My first was strait-up broken. (Good return policy, though.)

Problem is, it’s easy to confuse with the Laser 303 - which is AMAZING. At the same cost, you get a blindingly brilliant laser that can illuminate an entire room, and show a beam that is clearly defined accross your entire back yard.

(Oh, and the charger has a type-B outlet that works in the US.)

The Laser 301 is... Decent.

It does leave a beam at night, and is pretty strong, even in the day. Not as spectacular as the Laser 303, but still a solid laser.

Never tested any to see if they were “burning” lasers, but probably still plenty to blind you, so be careful.

Except the YL-303. That probably couldn’t scar eyes unless you threw it really hard.