Monochromatic radiation emitted when electron on hydrogen atom jumps from first excited to the grounds state irradiates a photosensitive material.The stopping potential is measured to be 3.57V.The threshold frequency of the material is_____
A. 1.6 × 10¹⁵ Hz
B. 2.5 × 10¹⁵ Hz
C. 4 × 10¹⁵ Hz
D. 5 × 10¹⁵ Hz
Answer:A
Monochromatic radiation emitted when electron on hydrogen atom jumps from first excited to the grounds state irradiates a photosensitive material.The stopping potential is measured to be 3.57V.The threshold frequency of the material is_____
A. 1.6 × 10¹⁵ Hz B. 2.5 × 10¹⁵ Hz C. 4 × 10¹⁵ Hz D. 5 × 10¹⁵ Hz