Photoelectric effect

2015/5/13Kyujin Shin

Seongwook Park

Contents

(1) What is a photoelectric effect?(2) What was the dilemma in the photoelectric effect?(3) What is Einstein’s assumption?(4) How did it resolve the dilemma?(5) What is a “scattering”?(6) How did Compton prove Einstein’s theory? (7) Any application of the photoelectric effect in real life?

(1) What is a photoelectric effect?

(2) What was the dilemma in the photoelectric effect?

Why increasing the intensity had no effect to the en-ergy of ejected

electron??

(3) What is Einstein’s assumption?

(4) How did it resolve the dilemma

(4) How did it resolve the dilemma

𝐸 h𝑙𝑖𝑔 𝑡=β ν=Φ+𝐸𝑒𝑙𝑒𝑐𝑡𝑟𝑜𝑛

(4) How did it resolve the dilemma

𝐸 h𝑙𝑖𝑔 𝑡=β ν=Φ+𝐸𝑒𝑙𝑒𝑐𝑡𝑟𝑜𝑛

𝐸𝑒𝑙𝑒𝑐𝑡𝑟𝑜𝑛=β ν−Φ

(5) What is a “scattering”

(5) What is a “scattering”

(6) How did Compton prove Ein-stein’s theory?

λ 𝑖𝑛𝑐𝑖𝑑𝑒𝑛𝑡 λ𝑟𝑒𝑓𝑙𝑒𝑐𝑡

λ 𝑖𝑛𝑐𝑖𝑑𝑒𝑛𝑡<λ𝑟𝑒𝑓𝑙𝑒𝑐𝑡

(7) Application of the photoelec-tric effect in real life?

- CCD Camera

- Photoelectric sensor

(7) Application of the photoelec-tric effect in real life?

- Photoelectron spectroscopy

(7) Application of the photoelec-tric effect in real life?

Acknowledgement

• Kyujin Shin : Part (4), (5), and (6)

• Seongwook Park : Part (1), (2), (3), and (7)

References

(1) Thomas Engel, Quantum chemistry &

Spectroscopy, second edition, page 5-6.

(2) Wikipedia, en.wikipedia.org, Search

word ‘Photoelectric effect’ and ‘Compton

scattering’.

Thank you