光电效应 / Photoelectric Effect
📺 视频讲解
光子能量 E = -- eV
逸出功 φ = -- eV
最大动能 Kmax = -- eV
遏止电压 V₀ = -- V
光子 Photon
电子 Electron
金属板 Metal Plate
集电极 Collector
☀ 光源设置 / Light Source
⚒ 金属选择 / Metal Selection
⚡ 遏止电压 / Stopping Voltage
演示要点 / Key points
hf
光子能量取决于频率
Photon energy depends on frequency, not intensity.
φ
存在截止频率(红限)
Threshold frequency exists. Below it, no electrons are emitted.
K
光强影响电子数量非动能
Intensity affects number of electrons, not their kinetic energy.
V₀
遏止电压测最大动能
Stopping voltage measures max kinetic energy: K = eV₀.