Hi Guys,
While I was searching for photoelectric device to demonstrate the photoelectric effect . I found these two kits in Alibaba but the parts i encircled in white i dont know what are they!! And where to find them.
Could any one help and thanks

 

hi d12,
That 25109 object is an opto coupler, IE; LED light emitter [D] and the light Detector [K].
The D and K symbols represent the emitter and detector devices of the opto coupler.

Do you follow, OK.
E

 

hi d12,
That 25109 object is an opto coupler, IE; LED light emitter [D] and the light Detector [K].
The D and K symbols represent the emitter and detector devices of the opto coupler.

Do you follow, OK.
E

Thanks Dear Eric ,
Really appreciated . It seems this kit is not as intened! Because in photoelectric effect, should be electron emiited when the cell exposed to light . Photo coupler works is different story.
First kit also confusing brcause I never seen such cell or dont know what include .

 

Hi dhia,
What type of light experiments are you trying to test/try?

Often from Alibaba the customer does not get the device he has ordered, also it has very little/poor documentation.
E

Update:
This PDF has information on detectors.

 

Hi dhia,
What type of light experiments are you trying to test/try?

Often from Alibaba the customer does not get the device he has ordered, also it has very little/poor documentation.
E

Update:
This PDF has information on detectors.

Dear Eric,
Actually am trying to do photoelectric effect . It consist of photoelectric tube ( which generate electron when exposed to light with proper frequency) . This tube is rare and not easy to find but should be some alternatives I dont know about it.
I was thinking that 25109 kit is demonstrating photoelectric effect but it is complete scam.

If you have any idea, would be highly appreciated .

 

hi dhiaa,
If you read the PDF I posted, you may be able to find a HAMAMATSU photo device that is suitable.

E

 

hi dhiaa,
If you read the PDF I posted, you may be able to find a HAMAMATSU photo device that is suitable.

E

Very gentle
Thanks Dear Eric

 

1pc F-13 MELZ Photoelement Photocell SOVIET TUBE NOS
Buy HERE for $10.00

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https://wanda.fiu.edu/boeglinw/courses/Modern_lab_manual3/photo_effect.html
https://www.3bscientific.com/us/photoelectric-effect-vacuum-cell-1000915-u8482415-3b-scientific,p_663_15460.html

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Evacuated photocell for demonstrating the photoelectric effect and showing that the emission of electrons increases with increasing light intensity. Mounted ready for use on a connector base with electrical wiring and shaft.

Specifications:

• Cathode: Cesium on oxidized silver
• Cathode area: 2.4 cm²
• Operating voltage: 50 V, max. 200 V
• Working resistance: 1 MΩ
• Dark current: <0.05 µA
• Sensitivity: 20 µA/lumen
• Photoelectric current density: max. 3.0 µA/cm²