Diana conducts a physics experiment using a laser and water bottle to demonstrate light behavior, including total internal reflection and the critical angle. The video explores the role of fiber optics in communication, highlighting their efficiency in data transmission compared to traditional methods. It discusses the infrastructure of fiber optic networks and their importance in modern communication, concluding with a reflection on the future of communication technology.

What happens to the laser beam when it is shone through the water bottle?

• It refracts out of the water.

• It travels straight through the water.

• It follows the water stream due to total internal reflection.

• It gets absorbed by the water.

What is the critical angle in the context of light and water?

• The angle at which light is absorbed by water.

• The angle at which light is scattered in water.

• The angle at which light refracts out of the water.

• The angle at which all light reflects within the water.

How does total internal reflection benefit communication technology?

• It increases the speed of sound transmission.

• It reduces the need for physical cables.

• It allows light to travel faster than sound.

• It enables light to be confined and guided over long distances.

What material is primarily used in fiber optic cables?

• Plastic

• Copper

• Glass

• Aluminum

How are fiber optic cables laid across oceans?

• They are suspended in the air using balloons.

• They are buried under the ocean floor using underwater plows.

• They are attached to ships that travel across the ocean.

• They are floated on the ocean surface.

Why is upload speed typically slower than download speed?

• Because most people upload more data than they download.

• Because internet service providers prioritize downloading.

• Because uploading requires more energy.

• Because upload speeds are limited by government regulations.

What happens to data packets as they travel across the internet?

• They always take the same path to their destination.

• They are sent directly to the destination without any nodes.

• They are sent as a single large packet.

• They can take different paths and are reassembled at the destination.