Formal Education
Classroom-Ready Activities
Science Olympiad Webinar
Space Math @ NASA
Informal Education
Background
Interactive Games
Space Scoop
STOP for Science
Chandra Podcasts
Printable Materials
Resource Request Form
Educators' Comments
Evaluation Form
Links & Resources
Education Collaborations
Passport to Knowledge
Space Place
Web Shortcuts
Chandra Blog
RSS Feed
Chandra Mobile
Chronicle
Email Newsletter
News & Noteworthy
Image Use Policy
Questions & Answers
Glossary of Terms
Download Guide
Get Adobe Reader
Chandra 101: Overview for Teachers and Students
Page: 1 2 3 4 5 6 7 8
A Look at X-Rays

What are x-rays?

X-rays are a highly energetic form of light, not visible to human eyes. Light can take on many forms -- including radio waves, microwaves, infrared, visible, ultraviolet, X-ray and gamma radiation. Very low temperatures (hundreds of degrees below zero Celsius) produce mostly low energy radio and microwave photons, whereas cool bodies like ours (about 30 degrees Celsius) produce largely infrared radiation. Objects at very high temperatures (millions of degrees Celsius) emit most of their energy as x-rays.

Electromagnetic spectrum, showing wavelength and temperature