Photoelectric Effect - Light Above Collector

Electrons emit from emitter when light energy exceeds work function, even with zero voltage

Ready
Light Frequency 600 THz
Infrared Visible UV
Light Intensity 50%
Metal Work Function 2.0 eV
Applied Voltage 0 V
Retarding Zero Accelerating

Quantum Physics Information

Photon Energy
2.48 eV
Electron Kinetic Energy
0.48 eV
Current Flow
0.0 μA
Electrons Emitted
0
Stopping Potential
0.48 V
Threshold Frequency
483 THz

Key Observations:

• Electrons emit immediately when light energy > work function, even with zero voltage

• No time delay - emission is instantaneous (proves particle nature of light)

• Frequency threshold - no emission below certain frequency regardless of intensity

• Kinetic energy depends on frequency, not intensity

• Current depends on intensity - more photons = more electrons