# Photoelectric and Compton Effects

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## Photoelectric and Compton Effects

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Lecture number:
32
Pages:
3
Type:
Lecture Note
School:
The University of Vermont
Course:
Phys 012 - Elementary Physics
Edition:
1
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Unformatted text preview:

Lecture 33 Outline of Last Lecture I. Problem: A diverging lens with focal length of -20 cm is placed 50 cm to the left of a converging lens with focal length of 15 cm. An object is placed 10 cm to the left of the diverging lens. How far is the final image from the second lens? a. 1/di1 = 1/f1 – 1/do1 = 1/-20 – 1/10 = -3/20 b. di1 = -20/3 cm c. do2 = di1 + 50 cm d. 1/di2 = 1/f2 – 1/do2 = 1/15 – 1/(50 + di1) III. Problem 47 from chapter 26 in text book a. nred = 1.662 b. nairsinθ1 = nredsinθ2 c. θ2 = sin-1(sin60/nred) = 31.4 degrees d. θ3 = 90 – (180-60-58.6) = 90 – 61.4 = 28.6 degrees e. nredsinθ3 = nairsinθ4 f. θ4 = sin-1(nredsin(28.6)) = 52.7 degrees IV. Problem 37 from chapter 27 in text book a. λ = 498 nm, L = 1.6 km b. θmin = 1.22λ/D Physics012 1st Edition

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