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
Bugs of Summer
Summer is here! Everyone will spend a lot more time … read more
In the Know
Spring Forward!
Did you know people can time travel? It’s true! This … read more
In the Know
Winter Charities
Winter can be a hard time for many people. Let’s … read more