LESSON 18

PHYSICS LESSON 18 FOR
WEDNESDAY, JUNE 30, 2010

I Introduction

II Logistics:
a. Return of papers
b. Running grades

III Review Lesson 17: Spectroscopy
Isaac Newton
Gas hydrogen

_____ n = 2
__e__ n = 1 ground state give off light

IV. Lesson 18: Radiation

U238 – Po234

1H1

1H2 Deuterium
1H3 Tritium
H2O
2 1H1 = 1H2 + b+
1H2 + 1H1 = 2He3
2He3 + 2He3 = 2He4 + 21H1 + E

Ra 1622 years = ½ Ra; another 1622 years =
¼ Ra, etc.


V. Lab Exercise #14: Radioactivity

VI. Homework Set 5: Hand out, due Thursday, 7/1

VII. Essay 5: Enrico Fermi, due Thursday 7/1