Last Modified: 2011-11-04
Related Textbooks:The Cosmic Perspective: Stars, Galaxies, and Cosmology with MasteringAstronomy™ (6th Edition)
- transparent objects transmit light
- opaque objects block (absorb) light
- reflection or scattering
Light comes in many colors that combine to form white light
Energy of a photon depends on its frequency
Reflection can change the polarization of light
Gas (water vapor)
Absorption Line Spectrum
depends only on temperature
2. Hotter objects emit photons with a higher average energy
- blueshift: object moving toward us
- redshift: objects moving away from us
Words From Our Students
"StudyBlue is great for studying. I love the study guides, flashcards, and quizzes. So extremely helpful for all of my classes!"
Alice, Arizona State University
"I'm a student using StudyBlue, and I can 100% say that it helps me so much. Study materials for almost every subject in school are available in StudyBlue. It is so helpful for my education!"
Tim, University of Florida
"StudyBlue provides way more features than other studying apps, and thus allows me to learn very quickly! I actually feel much more comfortable taking my exams after I study with this app. It's amazing!"
Jennifer, Rutgers University
"I love flashcards but carrying around physical flashcards is cumbersome and simply outdated. StudyBlue is exactly what I was looking for!"