Photon Energy Amplitude Intensity Relations

Energy

$E=hf$

But $E\alpha A^2{f}^2$

This is because:

• Photoelectric effect has a linear dependence
• Light has wave-like and particle-like properties, so $f^2$ is not best suited
• It just be different, the way it is quantized as $E=hf$

Intensity

Also $I\alpha n$

But $I\alpha A^2$

This is because:

• Its quantized bro
• You could say $A\alpha \sqrt{n}$