Demonstrate the Photoelectric Effect! | Arbor Scientific
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- Опубликовано: 2 авг 2024
- Demonstrating the photoelectric effect is as easy as using an electroscope and a few common lab materials. In this video, watch physics teacher James Lincoln demonstrates the photoelectric effect.
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Наука
Action Lab brought me here.
Wow. Great video. Really enjoyed it. Learned new things. Please make more videos
This video provides a very clear demonstration of the photoelectric effect, using some fairly common lab devices. I will use this demonstration in class.
just now studied it in my chem textbook
let me share it with my friends
(class 11 cbse)
really neat looking electroscope
Thank you Sir ...
Great video. I will use it with my students. The video makes concepts clearer!
r u a teacher?
So interesting video omg!!!
WTF the Rock ?
What are you doing here ?
Yeh come on that interesting physics video =)
excellent 👍👍👍👍👍
kindly reply,
is it the same neon bulb which is used in an electric iron,
will it work fine with blue laser
Nice.
Is it not possible to demonstrate by copper plate instead of zinc plate?
This UV is 254 nm wavelength so photo electron emission from copper is possible, I think.
Am I right?
Thanks
What he means by saying charging positively is, removing electrons from the electroscope. proton is not moving.✨😜
Yes, that is true. It's because it is not so easy to take out the protons out of the nucleus. It's because protons are very heavy and packed inside the nucleus. It's takes a lot of force for kicking out a proton from the nucleus and it's only possible for high energy gamma rays to do so. No other electromagnetic radiation can do so.
I have purchased these electroscopes for student use and am having trouble getting them to deflect when the charge is just induced but not contacting the electroscope. Can you be more detailed about how to bend the leaf? Or make a really clear video on trouble shooting? I spent a lot of $ on these and want them to work!
Lauren: Give the following a try and let me know if it works.
a) Check that your electroscope charges by conduction very easily
b) Bend needles until it does
c) Touch the top pan with a finger on one side, bring a WELL-CHARGED object to the other side but do not touch
d) Remove your finger
e) Remove the well-charged object
f) The needle should deflect
g) Bring the same well-charged object near the scope and it should un-deflect, proving the charges are opposite
a2) If this still doesn't work then you need to find "the sweet spot" that means the distance at which the needle is deflected but there is no discharge/spark that carries charge from the well-charged object to the electroscope
b2) If that doesn't work, switch the pan top for the ball top and try a-g again
c2) If you are still having trouble, try a different well-charged object, try a different charge ie positive or negative, and get the room cold (low humidity)
where to buy this electroscope?
What UV wavelength is required?
It depends on the metal which you use. Cesium for instance requires the lowest frequency
Higher frequency light has more energy. UV light used in experiment has high frequency and high energy. Visible light is lower energy.
@@electron7373 This does not answer my question. What frequency (or wavelength) UV light is required?
Sir I am from india
ok bud