What Happens When You Reflect a Laser Back Into Itself?

[TheActionLab]

One other factor I didn’t mention is that some lasers have optical feedback from photodiodes. This could have been the case as well here that is causing some dimming.

[asksearchknock]

5:50 - who else wiped their screen - be honest 😂

[satyajitbeura_factscheck]

*Intrusive Thoughts Getting Really Strong
The Action Lab : "Yes"

[dancoroian]

"I'm not moving it at all, but it's flickering"

As long as you are alive, you are always moving at least a little bit -- whether intentionally or inadvertently

[fejesjoco]

So if I could shoot laser light out of my eye, I would be immune against people trying to blind me with laser?

[artzoneproductions]

0:20 What could it be more interesting than destroying the world? 🤣🤣🤣

[pegasusofdark]

I thought it was my screen that had the hair😂

[DudleyToolwright]

Interesting video. Laser diodes are pretty much always fed with a control loop that samples some of their output. Without the control loop they would burn themselves out. Part of what you are seeing might have to due with this control loop, rather than destructive interference.

[ConfidentialMeerkat]

You have been repeatedly told we are not happy about "that company " yet you continued to accept them. Not cool man, like others, I'm out, I've just checked social blade, and you're down 33% subscriptions you WILL learn even if it's the hard way! Adding it to the block list is a very bad way to handle things.

[TulgaD]

3:25 Fun fact: this probably only works with un-angled "UPC" connectors, like the one shown in the video, indicated by the blue connector housing.
There are also the much more common green APC connectors, which are angled at an 8° angle to reduce the amount of light reflected back into the fibre, making for a better connection.

[JJFX-]

I thought people were exaggerating about how you handled critical feedback and I gave you the benefit of the doubt but after seeing how many comments were just purged I've lost a lot of respect. Many of which were still trying to be respectful while pointing out their concerns about a certain company.

This isn't a good look man. It isn't just about negativity.

[dudekumar]

Thanks for this video, i had this question in my mind the whole life

[randallschad]

Are you sure it's the destructive interference? When you're perfectly in line, fewer observable photons escape, so the light appears dimmer. There MAY be destructive interference, but you only addressed that in theory, not in demonstration.

[__]

Always remember to not look at laser with remaining good eye.

[poligloti]

After years, I'm out. Where the money comes from DOES matter, especially if you're doing publicity for a trap. Goodbye

[dolphinfullive]

You should try another types of lasers. Diode lasers have optical feedback very often. A built in photodiode to control optical power of laser. So flickering is feedback work.

[notmyworld]

05:40 - Did you try to brush that little piece of hair off your computer screen too?

[transecho]

glad to see money is worth more to you than morals

[pmarchi]

Some types of red laser diodes contain an internal monitor photodiode (on which some of the emitted light goes), to allow feedback on the optical output power.
Presumably, the laser diode emits less power because the returning beam hits the monitor photodiode, causing a reduction in the drive current of the laser diode 😊

[TSGEnt]

In audio engineering when you reverse the phase of an audio waveform and lay it directly over the un-inverted wave, you get phase cancellation. you'd think you'd get twice as much volume but you don't. In otherwords, you don't hear the audio at all. Could this be the same in this case? Waves of sound, wav e of light. Same right? Is the mirror inverting the wave of light?