Review Concepts for Exam II

Chapter 26

Electromagnetic Waves

Electromagnetic Spectrum:

Longest Wavelength to Shortest Wavelength

Radio Waves, Microwaves, Infrared, Visible Light, Ultraviolet, X-rays, Gamma Rays

Visible Light: ROY G. BIV

Longest Wavelength to Shortest Wavelength

Red Orange Yellow Green Blue Indigo Violet

Transparent & Opaque Materials

Shadows: Penumbra, Umbra

Solar Eclipse, Lunar Eclipse

Parts of the Eye, Rods, Cones, Blind Spot

Chapter 30

Atoms can absorb or emit light

Continuous Spectrum from Hot Solids

Emission Spectrum from Hot Gases

Absorption Spectrum from Stars (cool gas surrounding the star absorbs certain wavelengths)

Objects that create Spectra: Prisms, Diffraction Gratings, Spectroscopes, CD's


Coolest Glowing Objects to Hottest Glowing Objects

Red Hot Orange Hot Yellow Hot White Hot Blue Hot

Fluorescence: process of absorbing high energy photons and emitting low energy photons

Phosphorescence: same as fluorescence except that light is emitted slowly

Laser: a coherent monochromatic beam of light.

Chapter 27

Color Addition Diagram (Spotlights)

Color Subtraction Diagram (Filters)

Additive Primary Colors: Red, Green & Blue

Examples: TV, Computer monitors, Spotlights

Subtractive Primary Colors: Magenta, Yellow & Cyan

Examples: Newspaper Printing, Colored Filters

Complementary Colors: Colors that add to give white light

Red + Cyan = White

Green + Magenta = White

Blue + Yellow = White

After Images

Chapter 28

Reflection: diffuse and specular

Refraction & Dispersion

Rainbows & Mirages

Law of Reflection, Critical Angle

Converging Lens, Diverging Lens

Review Lab Exercises

Reminder: The second and final exam will contain questions pertaining to the lab. Look over the review for the lab exam.

How to Study

1. Review homework questions.

2. Review the Summary of Terms section at the end of each chapter.

2. Review the questions in blue throughout the chapters.

3. Study each picture in the chapters and read their captions.

4. Reread the chapters.