Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
7.7
Points
2.0
Fiction/Nonfiction
Nonfiction
Word Count
10773
Points per Word
0.000186
Page Count
77
Points per Page
0.025974
Description
This book discusses the history of light, the invention of the lightbulb, and new and anticipated developments in the use of light.