How UV Light Works

A demonstration of the principles behind ultraviolet light, and some of the things you can see using a UV light source. For my students in media technical theory at Ryerson University Toronto. RTA School of Media.

[awesomesaucer]

thank you! very educational reminds me of old science vids like shown in classrooms i love it

[Shonade_Malik]

When you look directly at the source of a normal blacklight at a laser tag room, or a golf course room, it looks like such a beautiful deep color. Colour sensors and the camera itself prevent us from seeing the beauty of UV when looking at the screen.

[BOZAK]

NOW I UNDERSTAND WHAT KEEPS ME SAFE FROM VOLATILES AT NIGHT

[heartz]

Can infrared pick up ultraviolet. Also can speed cameras IR pick up UV? night or day

[LUXITANE]

What elements also glow under this light?

[timboe]

2:10-2:20, most uncomfortable 10 seconds of my day.

[sasukefallen]

So if I make designs on frames with highlighter markers will a last a long time?

[rwlsh]

so like if something glows under uv light does that just mean it contains phosphorous? like is there phosphorous in our passports?

[iWatchVidsmyself]

i searched uv light hoping for dying light but i got this and im happy

[dcadfdfbdf]

Why does the UV lightbulb itself glow when it is on? Shouldnt it be invis?

[explorer]

Ok so if UV light emits photons ... can we see photons??? I was looking at a uv light the other day and when I looked close enough I could see Multiple little things moving and jumping around like I was seeing the waves jump around the objects it was under... I don’t know if that’s normal or not but I’ve been searching the web for an explanation and haven’t found one yet...

[photonvoid]

i think you just gave your passport to the world

[charlieobrien]

They don't 'glow' they flourese (emit). The working wave length of uva is 365nm, when you shine that onto a florescent material it then converts/emits that wavelength in to a visible wavelength (445nm being indigo to 650nm being red) if they did glow you wouldn't need the black light.

[DtodaH]

Can you do one where you explain different nM UV ight and why some interact with some fluorescence and others not? Or point me in the right direction please?

[TopTributeBands-N-Stuff]

I wanted true UV light that is used to purify water etc... Oh well, subbed ya anyway cuz I love science.

[skyzra]

So the real answer would be that by oscillating electromagnetic fields at a certain frequency it produces uv light radiations.

[kevanhubbard]

UVA and UVB are used medically to treat eczema and psoriasis.I don't think that UVC is so used.

[MisaelSuaveTeamAccount]

Dude its not invisible its just our retinas cant detect it

[normalfilms]

Darkness is light in a certain level of light

[michaelmcmike]

thanks v interesting. tip of the day...you need bog roll mate :)