Question 2: Deduce the work function for sodium from Fig. Q2. The intersection of the straight line with the horizontal axis is the cutoff frequency, vo=5.8×1014 /sec. For most conducting metals the value of the work function is of the order of a few electron volts. Calculate the photon energy of a typical microwave wavelength of λ = 5 cm. Can this energy sufficient to eject photoelectrons from metal surfaces? Why? Stopping potential (V) 3 2 0 VO 8 12 4 Frequency (1014/sec) Fig. Q2

Question 2: Deduce the work function for sodium from Fig. Q2. The intersection of the straight line with the horizontal axis is the cutoff frequency, vo=5.8×1014 /sec. For most conducting metals the value of the work function is of the order of a few electron volts. Calculate the photon energy of a typical microwave wavelength of λ = 5 cm. Can this energy sufficient to eject photoelectrons from metal surfaces? Why? Stopping potential (V) 3 2 0 VO 8 12 4 Frequency (1014/sec) Fig. Q2

University Physics Volume 3

17th Edition

ISBN:9781938168185

Author:William Moebs, Jeff Sanny

Publisher:William Moebs, Jeff Sanny

Chapter6: Photons And Matter Waves

Section: Chapter Questions

Problem 66P: The work function for potassium is 2.26 eV. What is the cutoff frequency when this metal is used as...

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