Target Exam

CUET

Subject

Physics

Chapter

Dual Nature of Radiation and Matter

Question:

According to Einstein's photoelectric equation:

Options:

$K_{max}=hv-\phi_0$

$hv=K_{max}-\phi_0$

$K_{max}=hv+\phi_0$

$\phi_0=K_{max}+hv$

Correct Answer:

$K_{max}=hv-\phi_0$

Explanation:

The correct answer is Option (1) → $K_{max}=hv-\phi_0$

where,

$hv$ = energy of the photon

$\phi_0$ = work function

The equation is based on the principle that the amount of energy produced by electrons is directly proportional to the amount of energy induced in terms of photons in the material.