wednesday, september 25, 2015 take out the following: pen or pencil planner (p. 33) energy...
TRANSCRIPT
![Page 1: Wednesday, September 25, 2015 Take out the following: Pen or pencil Planner (p. 33) Energy Workbook (p. 28)](https://reader033.vdocuments.site/reader033/viewer/2022051622/5697bf921a28abf838c8f194/html5/thumbnails/1.jpg)
Wednesday, September 25, 2015
Take out the following:Pen or pencilPlanner (p. 33)Energy Workbook (p. 28)
![Page 2: Wednesday, September 25, 2015 Take out the following: Pen or pencil Planner (p. 33) Energy Workbook (p. 28)](https://reader033.vdocuments.site/reader033/viewer/2022051622/5697bf921a28abf838c8f194/html5/thumbnails/2.jpg)
Electromagnetic Energy: page 28
![Page 3: Wednesday, September 25, 2015 Take out the following: Pen or pencil Planner (p. 33) Energy Workbook (p. 28)](https://reader033.vdocuments.site/reader033/viewer/2022051622/5697bf921a28abf838c8f194/html5/thumbnails/3.jpg)
Electromagnetic Waves
Travel as Transverse waves
Do not need a medium to move through.
Medium: a material through which waves travel.
![Page 4: Wednesday, September 25, 2015 Take out the following: Pen or pencil Planner (p. 33) Energy Workbook (p. 28)](https://reader033.vdocuments.site/reader033/viewer/2022051622/5697bf921a28abf838c8f194/html5/thumbnails/4.jpg)
![Page 5: Wednesday, September 25, 2015 Take out the following: Pen or pencil Planner (p. 33) Energy Workbook (p. 28)](https://reader033.vdocuments.site/reader033/viewer/2022051622/5697bf921a28abf838c8f194/html5/thumbnails/5.jpg)
Visible Light
The only part of the spectrum that we can see.
Every light source is made up of a different combination of colors.
![Page 6: Wednesday, September 25, 2015 Take out the following: Pen or pencil Planner (p. 33) Energy Workbook (p. 28)](https://reader033.vdocuments.site/reader033/viewer/2022051622/5697bf921a28abf838c8f194/html5/thumbnails/6.jpg)
Spectroscopes
An instrument used to observe the spectra of light sources.
![Page 7: Wednesday, September 25, 2015 Take out the following: Pen or pencil Planner (p. 33) Energy Workbook (p. 28)](https://reader033.vdocuments.site/reader033/viewer/2022051622/5697bf921a28abf838c8f194/html5/thumbnails/7.jpg)
Spectroscopes
Fluorescent
Incandescent
LED
String Lights
![Page 8: Wednesday, September 25, 2015 Take out the following: Pen or pencil Planner (p. 33) Energy Workbook (p. 28)](https://reader033.vdocuments.site/reader033/viewer/2022051622/5697bf921a28abf838c8f194/html5/thumbnails/8.jpg)
Why does light look white?
When you mix all colors of light together, the light appears white.
![Page 9: Wednesday, September 25, 2015 Take out the following: Pen or pencil Planner (p. 33) Energy Workbook (p. 28)](https://reader033.vdocuments.site/reader033/viewer/2022051622/5697bf921a28abf838c8f194/html5/thumbnails/9.jpg)
Why do we see different colors?
Objects absorb some colors and reflect others.
Light Source
Colors Absorbed into object
Color reflected
from object to eye
![Page 10: Wednesday, September 25, 2015 Take out the following: Pen or pencil Planner (p. 33) Energy Workbook (p. 28)](https://reader033.vdocuments.site/reader033/viewer/2022051622/5697bf921a28abf838c8f194/html5/thumbnails/10.jpg)
Why do we see different colors?
Objects absorb some colors and reflect others.
![Page 11: Wednesday, September 25, 2015 Take out the following: Pen or pencil Planner (p. 33) Energy Workbook (p. 28)](https://reader033.vdocuments.site/reader033/viewer/2022051622/5697bf921a28abf838c8f194/html5/thumbnails/11.jpg)
Apple in the dark…
A!!!
You will NOT see the apple…EVER…
![Page 12: Wednesday, September 25, 2015 Take out the following: Pen or pencil Planner (p. 33) Energy Workbook (p. 28)](https://reader033.vdocuments.site/reader033/viewer/2022051622/5697bf921a28abf838c8f194/html5/thumbnails/12.jpg)
Radio Waves
Have long wavelengths & low frequencies.
Microwaves use radio waves.
![Page 13: Wednesday, September 25, 2015 Take out the following: Pen or pencil Planner (p. 33) Energy Workbook (p. 28)](https://reader033.vdocuments.site/reader033/viewer/2022051622/5697bf921a28abf838c8f194/html5/thumbnails/13.jpg)
Infrared Radiation
Wavelength is slightly longer than visible light. Example: we are warm, because we are
absorbing infrared radiation from the sun.
![Page 14: Wednesday, September 25, 2015 Take out the following: Pen or pencil Planner (p. 33) Energy Workbook (p. 28)](https://reader033.vdocuments.site/reader033/viewer/2022051622/5697bf921a28abf838c8f194/html5/thumbnails/14.jpg)
Ultraviolet Light
Has a higher frequency. Can be healthy: Vitamin D, Hospitals use to
kill bacteria & viruses to sterilize. Overexposure can be harmful: kills healthy
cells, leading to skin cancer. We are protected by the ozone layer.
![Page 15: Wednesday, September 25, 2015 Take out the following: Pen or pencil Planner (p. 33) Energy Workbook (p. 28)](https://reader033.vdocuments.site/reader033/viewer/2022051622/5697bf921a28abf838c8f194/html5/thumbnails/15.jpg)
X Rays & Gamma Rays
X Rays: Very short wavelength. Have higher energy and greater penetrating
power.Gamma Rays have highest frequency.
Are emitted from nuclei of radioactive atoms.
Example: Cancer Treatment