Question

The work function of ceasium is 2.14ev. Find treshold frequency and threshold wavelenght

Answer 1

Answer:

E=hc/λ

Explanation:

Where, ɸ = work function and h is Planck’s constant ().

Threshold frequency = 2.14 × 1.6 × 10-19 / 6.6 ×10-34

= 5.2 ×10^14 hertz

Substituting the values, we get

λ = 4537 Angstrom