# NEET Physics Atoms Questions Solved

Monochromatic radiation emitted when electron on hydrogen atom jumps from first excited to the ground state irradiates a photosensitive material.The stopping potential is measured to be 3.57 V.The threshold frequency of the material is

(a)$4×{10}^{15}Hz$                               (b)$5×{10}^{15}Hz$

(c)$1.6×{10}^{15}Hz$                            (d)$2.5×{10}^{15}Hz$

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