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
Farm Equipment
It’s fall. Farmers are busy harvesting their crops. Let’s take … read more
In the Know
International Day of Persons with Disabilities
In December, there is a special day. It’s the International … read more
In the Know
Black History Month
February is Black History Month. Here are some Black women … read more