1. Wavelength, Energy Frequency Calculations Photoelectric Effect

2. Lesson Sequence Evaluate: Warm-Up
Explain: Energy, Wavelength, Frequency Calculations
Elaborate: Calculation Practice
Evaluate: Exit Ticket

3. Warm-Up

4. Objective Today I will be able to:
Correctly calculate the wavelength, energy and frequency of light emitted from an atom.

5. Homework Wear closed toe shoes tomorrow
Electrons Quiz – Wednesday, October 29
STEM Fair Conclusion Due November 14

6. Agenda Warm-Up Calculation Notes Calculation Practice
Flame Test Lab Introduction
Exit Ticket

7. Energy, Wavelength, Frequency Calculation Notes

8. Electromagnetic Spectrum

9. Calculating Wavelength and Frequency
C= 3.0 x 108 m/s (speed of light)
λ = wavelength (meters)
ν = frequency (Hertz or 1/seconds)

10. Calculating Energy and Frequency
Planck came up with the equation
E= hν
E = Energy (Joules)
h = Planck’s Constant
6.626 x J*s
ν = frequency (Hertz or 1/seconds)

11. Absorption of Energy Photoelectric Effect
Electrons are emitted from solids, liquids or gases when they absorb energy from light.

12. Calculation Examples

13. Energy, Wavelength, Frequency Practice
Complete the practice at your desk. Ask Ms. Ose for help if you have questions.

14. Flame Test Lab Introduction

15. Flame Test Lab Safety
Must wear goggles, aprons, closed toe shoes, tie long hair back, no baggy clothing
9 stations that you will rotate through
Must follow Ms. Ose’s instructions
When directed you will
Move to the station
Turn on the gas and light the Bunsen burner
Ms. Ose will turn out the lights
You will place 1 wooden splint soaked in a metallic salt in the flame and observe the color change
Ms. Ose will turn the lights on
You will record your observations on your worksheet
When Ms. Ose says so, you will rotate
Failure to follow the directions or any horseplay will result in removal from the lab.

16. Exit Ticket
What will I do to be safe and successful in lab tomorrow?