Photoelectric Effect

[@dalegriffiths3628]

Super video. Well done. Enjoyed the homemade electroscope experiment with the tape!

[@dominicestebanrice7460]

Excellent. Thank you!

[@nityanandadas5575]

This is the video I was looking for. Excellent video to pass photocurrent in air. I have the following queries . 1 I think you measured voltage drop across a resistance in stead of direct current measurement. How much resistance you used for voltage drop measurement? 1 MΩ or more? 2. I followed your experiment and got air current ( probably) . In your video there is no voltage drop when light is absent. How to avoid voltage drop due to air current? Please. Thanks and regards

[@laboratoriofisicacuanticau6865]

Dear friend, Thank you for your interest. We apologize for the delayed answer. 1. The resistance we used, in combination with an operational amplifier, was 10 MΩ. 2. When light is absent we do not see any voltage drop. Please, notice that we have in our circuit an additional resistance of 5 GΩ to protect it.

[@nityanandadas5575]

@@laboratoriofisicacuanticau6865 Thanks enough to help me with your answer to avoid air current. Thanks again.