Question

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
materials is
(a) 4 × 10¹⁵ Hz (b) 5 × 10¹⁵ Hz
(c) 1.6 × 10¹⁵ Hz (d) 2.5 × 10¹⁵ Hz

Answer 1

Answer:

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

materials is

c. 1.6 × 10¹⁵ Hz

Answer 2

Answer:

answer is

C

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