A light wave can be used to send messages.

Aly's teacher posts letters and words all over the room and she gives each student a laser pointer. She tells them she wants them to spell their name or pass a message to her without talking. What can the students do to communicate with only light?

How could you improve the design of the lights in this photo to help the plane land safely?

What is an example of an everyday light source that sends a message?

A lighthouse was designed to help sailors at sea. It tells them where the land is so they can keep their boats away from the rocks and shore.

What is a similar device that has been designed using light to communicate over a distance?

Morse code uses clicks and flashes of light to send coded messages. You want to create a secret language with your brother. How could you use a device like a simple lamp to pass messages and communicate secretly?

A new restaurant, "Yummy Tacos", is opening and wants to attract new customers. They have asked you to design a device that will say the restaurant's name over a distance using light. Which answer choice has the best design plan?

How could your teacher use a device like the traffic light in the classroom to help you with your work?

Jeanette was asked to design a device using light that would help keep people safe. Which successful, existing object should she research and model her design after?

Fireflies use their lighted bellies to communicate with other insects. Shelby has to create a device using light to communicate. Which object would be best to start with?