Photoelectric Effect

eCHEM 1A: Online General Chemistry
College of Chemistry, University of California, Berkeley

Curriculum and ChemQuizzes developed by Dr. Mark Kubinec and Professor Alexander Pines
Chemical Demonstrations by Lonnie Martin
Video Production by Jon Schainker and Scott Vento
Developed with the support of The Camille & Henry Dreyfus Foundation

[nikkim]

omg, that's soo cool! many thanks!

[kurtilein]

... also, the experiment i describe explains why robots stop working in fukushima, so many electrons get knocked out that electronics fail. its the same photoelectric effect, just on steroids, with a really scary x-ray generator.

But then, it would be unusual for a chemistry lab to have lead bricks and one inch thick lead glass and stuff for radiation safety and an x-ray generator at hand.

[HarshvardhanNigam]

interesting . tnx for the video . greetings from India

[kenrykikkas]

wow very cool Lonnie. greetings from estonia 😜😜😜😜😜😜😜😜😜😜😜😜😜😜😜😜😜😜

[deepanshudahiya]

It dod not help me too much but itzz cool and i liked this video, good work, i appriciate ur work☺

[danondler]

It would have been a little more informative to know what was used for the detector and how the meter was making the measurement.

[solank]

The meter is maxed when there is no color filter.

Does this mean that the raw un-filtered light has the highest energy to eject photoelectrons?

[kurtilein]

if you think THATS cool... well, i studied physics, and one experiment they showed in lecture was a box of 3 centimeter thick lead glass box with an x-ray source, and some electrostatic experiments. They open the box, put charge on the electrostatic meters and experiments, close the box, and the electrostatic experiments are discharged instantly, in split seconds. styrofoam pieces sticking to the inside wall of a container drop, the needle hits zero, and so on. THAT was cool.

[vignesh]

It 'll be very useful if u let me know the experimental set up, metal plates used and vacuum conditions followed by etc., I wish to perform this experiment, 'll u help me sir?

[shlyno]

how do photons travel through a glass vacuum light bulb? and then through the glass? if its filled with particles how does it not all get stuck in the glass and get stored there and make the object hotter? why does light travel through billions of particles that form a structure. I get it more if the structre is crystal, but what about if its glass and random arrangements? shoudlnt all glass look different? or maybe photons escape through because they are small? idk can someone give me the why of why particles travel though glass?

[Hannah-semh]

why are blue photons the highest visible photos and not violet?

[gilbet]

I noticed the multimeter needle goes to 7 with the blue filter. Is that 7 volts?

[HarrySmart]

+Barnes David Sky is blue due to the scattering of light and this video was good but not that informative at all, i believe it should've shown the principle more fundamentally, like how the electrons are emitted when photons hit it and where is the receptor of those electrons but anyways..its cool

[charanjitkaur]

even though i loved the video i am still a physics lover. so it wasnt that spectacular.

[shubhrajit]

Why does the multimeter return to 15 instead of 0?

[donegal]

University Level? the meter shows the energy of the photons?

[dilawarhussain]

Why white light show photoelectric effect

[rithulsabikumar]

why didn't the photoelectric effect take place before he placed the filter even though the same amount of blue and other wavelengths were present ?

[improbabile]

Riparami il tv akai aktv 3213ts e del video fonino honor by hauwei mi chiamo Biagio di balsamo e famiglia