Photoelectric effect 2015/5/13 Kyujin Shin Seongwook Park.
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Transcript of Photoelectric effect 2015/5/13 Kyujin Shin Seongwook Park.
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