Please Visit : https://phet.colorado.edu/en/simulation/photoelectric
Say This Please ! A New Year Gift From The Department of Physics,Dr. Zakir Husain College.
Share This Wonderful App With Your Friends ! It Can Read For You, In Any Language, Even A String of Emojis !. You can vary the Pitch and the Rate at Which the App Reads. You will learn that Male and Female voices only differ in frequency(pitch).
Click HERE To Download The App.
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