Physics 2

Exam1_S14ans_1.pdf-PHYS1212 Exam #1 Fall 2014 NAME

1 PHYS1212 Exam#1 Answers Spring 2019 PART A . Each problem 4 pts. 1. E 2. D 3. A 4. C 5. D 6. D 7. E 8. B 9. C 10. A 11. D 12. B 13. A 14. C 15. B PART B 1. (20 pts) a. (10 pts) b. (10 pts) 2 3 2. (20 pts) (a) (10 pts) The phase difference at y location: L dy λ π φ 2 = ∆ (4 pts) π π π π φ 2 100 10 5 10 5 2 1 10 5 10 1 10 500 2 1 5 1 500 2 7 5 3 2 9 × = × × = × × × × = × = ∆ − − − − − m m m m m mm cm nm (3 pts) Thus π π φ 100 2 2 × = = ∆ m , and

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