Understanding Light and Its Properties

Objects that produce or emit light are called ____________ objects

Materials that allow some light to pass through them are called ____________ materials

What is light?

• Light is an electromagnetic wave.

• Light travels in straight lines.

• Light travels at 300,000,000 m/s.

What is light speed?

• 300 000 km/s

• 300 000 000 m/s in a vacuum.

• In straight lines

How do we see luminous and non-luminous objects?

• Non-luminous objects REFLECT LIGHT.

• Luminous objects EMIT LIGHT.

Describe the journey that light takes from the sun to your eye when you are looking at a fish in a pond.

How does a pinhole camera work?