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)4×1015Hz                               (b)5×1015Hz

(c)1.6×1015Hz                            (d)2.5×1015Hz

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