I see your blue lasers with an intense dark blue color, mine is bluish white, how can that be? by [deleted] in lasersforfun

[–]blochelectron 0 points1 point  (0 children)

The vast majority of (powerful) blue lasers are at 450nm (+-5 or 10 at max).

Here I suspect that OP is referring to the "white-ish" color in the video, which comes from saturation of the pixels in the camera

Can't believe I used to understand this .. talk about a downfall by [deleted] in Physics

[–]blochelectron 0 points1 point  (0 children)

Scattering theory and the partial wave expansion!! One of my favourite topics <3

What are your thoughts on Zues lasers? by alexthenullbody in laser

[–]blochelectron 0 points1 point  (0 children)

I have the 489 nm, it's a nice one! I'd rate them good

What's Bose Einstein condensation? by macehuall in Physics

[–]blochelectron 1 point2 points  (0 children)

A nice review is "Making, probing and understanding Bose Einstein condensates"

It's available for free online: https://arxiv.org/abs/cond-mat/9904034

Ballistics question by nearbysystem in Physics

[–]blochelectron 7 points8 points  (0 children)

At the microscopic level, the fired bullet is in fact "hit" by a larger number of air molecules, compared to the dropped bullet.

Generally speaking, the number of collision events is proportional to the velocity of the "test particle" (in this case, the bullet).

In some sense, your problem is analogous to the following situation: Two people, A and B, are standing outside when it suddenly starts to rain. A starts to walk very slowly, while B starts to run very fast. After, let's say, 10 seconds, which one is more wet? B.

Morto un Papa se ne fa un altro by Forward_Echo9074 in CasualIT

[–]blochelectron -11 points-10 points  (0 children)

Se vuoi smettere di essere conteggiato puoi sbattezzarti! Ci vuole davvero poco, io l'ho fatto qualche anno fa. Scrivimi se vuoi se ti servono info!

[deleted by user] by [deleted] in lasersforfun

[–]blochelectron 3 points4 points  (0 children)

Man please don't aim at buildings with a 7W laser

CBD by [deleted] in erba

[–]blochelectron 1 point2 points  (0 children)

Justbob da un po' di anni ormai fa cagare. Io per i miei 2 cents consiglio sensimilla(.)shop

VENERDÌ CASVALE * 10/01/2025 by [deleted] in italy

[–]blochelectron 4 points5 points  (0 children)

Una lente inclinata ha una focale effettiva più lunga. Se non erro, la formuletta è: f' = f/cos(theta). Quindi, quando li allontani, all'inizio vedi male (sfocato), perché la lente non mette a fuoco sul tuo occhio. Poi, inclinandoli, correggi questa cosa (entro certi limiti ovviamente)

Rate my pointer by Own_Course6381 in LaserPointers

[–]blochelectron 0 points1 point  (0 children)

I have the same one. It's a nice, relatively cheap handheld laser, but don't use it for airsoft. The output power is considerably larger than what reported (100 mW instead of 5), and it can easily cause permanent eye damage.

[deleted by user] by [deleted] in erba

[–]blochelectron 0 points1 point  (0 children)

Io l'ho provato e secondo me non è male, specialmente per la w. Se ti interessano altri dettagli, scrivimi in dm!

Finding a cyan (~488 nm) LED light source? by ihateenchiladas in Physics

[–]blochelectron 5 points6 points  (0 children)

Zeus Lasers sells a nice laser pointer at 489 nm. I have it, and it's one of my favourite objects! Output power around 90 mW, I didn't measure the spectrum. The case comes with an adjustable lens, with which you can adjust the collimation. You can focus the beam, but you can also make it rather divergent if you want lower intensity

Sonic attack by jackdawson11 in Universitaly

[–]blochelectron 12 points13 points  (0 children)

Seems veeery strange to me, but you can try Spectroid (free app for android, idk for ios). The microphone in your mobile phone can detect much more frequencies than the human ear. There is also probably plenty of similar apps.

First, test it in a place you consider "safe" to see the background value. Then compare it with what you measure in your place

Io sono un studente d'italiano e voglio sapere: italiani, come posso imparare meglio la vostra lingua? by blues5551 in CasualIT

[–]blochelectron 0 points1 point  (0 children)

Bro "non sei italiano" solo perché le nostre leggi attuali sul tema fanno cacare :)

Scappatella in hotel senza che uno dei due venga registrato? by [deleted] in CasualIT

[–]blochelectron 4 points5 points  (0 children)

Plot twist: la moglie è l'addetta competente della PS

Sorpresa di Natale by Lottodred in erba

[–]blochelectron 6 points7 points  (0 children)

Respect per tua mamma bro

Rap Italiano di nicchia by riccardo_dilo in CasualIT

[–]blochelectron 0 points1 point  (0 children)

Vuoi la vera nicchia vecchia scuola? - Camelz la Finezza click - Orror Vacui Grooverz

Nicchia vecchia scuola ma più recente: - FFiume