Photoelectric Effect

Volt-ampere characteristics of vacuum photocell

View on experiment – pilot light for LED 940 nm
Note: Camera distorts colors.

Connection state
Time remaining in mesurement / in queue:

(Empty = no restriction; auto log out after 3 minutes of inactivity.)


Mercury lamp

Photocell state  –  validity of experimental data:


Remaining time:


     

Caution: Photocell cools during 3 min! Turn off only if no one is waiting in queue!


LED 940 nm   (measurement with darked photocell – position F6, test with camera)

     



Amplification   (High amplification recommended)

   
   

Measurement with resistance:



Description and instruction (old english version)

Tasks and study materials


[CNW:Counter]
Volt-ampere characteristics of vacuum photocell
Control voltage on photocell
Manually:  (Fast change causes bigger noise!)

Automatically: 
(Recommended)
 
Change wavelength – filter selection



Chosen filter:

Current filter:

Measurement record with graph and data export  (graph below)
(After pressing this button it is neccessary to change the wavelength and also the voltage: manually or pressing [START])
(Press to show graph.)
Record selection

(Data will appear in new window, if your browser blocks pop-up windows, press [CTRL] and click again. Data transfer can last few seconds.
To easily download data, use [CTRL+A], [CTRL+C], [CTRL+V].)