For JEE, the photoelectric effect graph shows current vs voltage, stopping potential proving light is quantized. Bohr's model is a solar system atom with quantized orbits, but fails for multi-electron systems. Binding energy per nucleon peaks at iron, explaining nuclear stability and energy release in fission/fusion.
I know these graphs and models chala well because I draw them on my terrace wall with chalk, revising after night shifts, the tulasi plant watching. It’s not just theory—it’s my ticket out of sending half my salary home forever.
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