PChem322 s22 w1

...return to Chem 322 - home

- Welcome

- Attendance

- Syllabus/Expectations

Weds, Jan 27, 2021

Chapter 1: From Classical to Quantum Mechanics

Intro, Sec 1.1, Sec 1.2

Read

Sec 1.3 Blackbody Radiation

Plank's Law (Wikipedia)

- All objects are essentially "hot" (considering the concept of absolute zero).

- All (hot) objects radiate light (electromagnetic radiation).

- The wavelength/frequency of the light emitted from a (hot) object is related to the temperature of the object.

- We can make a graph of wavelength (λ) or frequency (ν) as a function of temp (T), but at any given temperature light emitted has a range of λ or ν. So instead we develop some expressions using the term spectral density (ρ - rho).

Thurs, Jan 28, 2021

Meet in CSB 378

PLEASE make an entry in your lab notebook

Activity 1: Mathematica

- Basic Plot statement

• Plot[x^2, {x, 0, 10}]

- Plotting 2 function on one graph

• Plot[{x^2, X^3}, {x, 0, 10}]

- "Manipulate" a Plot

• Manipulate[Plot[{a*x^2, a*x^3}, {x, 0, 10}], {a, 1, 2}] ...with y-axis range defined
• Manipulate[Plot[{a*x^2, a*x^3}, {x, 0, 10}, PlotRange -> {0, 2000}], {a, 1, 2}]

Challenge: Reproduce the Figure 1.2 above for Plank's Blackbody Radiation (spectral density vs frequency)

- First try and use the "Manipulate" function, then do the plot of 5 functions.

- See here for the function (slightly different than book) --> Plank's Law (Wikipedia)

Activity 2:Emission Spectra

Demonstration

Excel worksheet

Activity 3

NOVA: Beyond the Elements

Time 5:00 pm

Friday, Jan 29, 2021

Sec 1.4 The Photoelectric Effect

Photoelectric Effect worksheet