A laser is a thin beam of light. People use lasers all the time. You may have a laser at home. A DVD player uses a laser to read a DVD. A cashier uses a laser to read bar codes.
Photo Credit: ktsdesign/Shutterstock
In the Know
Who Was King Tut?
King Tut Day is celebrated on November 4. This was … read more
In the Know
Different Ways We Learn
The school year is just beginning. You may be starting … read more
In the Know
A Cherokee Celebration
Let’s learn about the Cherokee National Holiday! The Cherokee National … read more