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Physics
Dual Nature of Radiation and Matter
According to Einstein's photoelectric equation:
$K_{max}=hv-\phi_0$
$hv=K_{max}-\phi_0$
$K_{max}=hv+\phi_0$
$\phi_0=K_{max}+hv$
The correct answer is Option (1) → $K_{max}=hv-\phi_0$