Unit 10 Blog Post #1

Today in class, we started by reviewing for a unit 9 test. We did the unit 9 review in the packet and summarized what we learned last week. After the test, we started unit 10. Unit 10 was about light. Light can't be seen unless it gets to your eyes, but there isn't just one type of light. Different types of lights are ultraviolet, X-rays, and gamma rays. In theory, no object can go faster than the speed of light. The speed of light is 299,792,458 meters per second. Mr. Blake made us calculate how far light travels in one earth year. This is called a light year. The answer was 9.47 times 10 to the 15th.

This is a picture of a light in my room. I can see the light in my room because the light reaches my eyes. This light is visible light, if it was infrared or ultra violet. I wouldn't be able to see the light.