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?

What is light speed?

• 300 000 km/s

• 300 000 000 m/s in a vacuum

• Both of the above

How does light travel?

• In straight lines

• In curves

• In waves

How do we see luminous and non-luminous objects?

• Non-luminous objects reflect light

• Luminous objects emit light

• Both of the above

Give four examples of objects that are light sources.

Explain why it is so dark at the bottom of the ocean but water is transparent.

How does a pinhole camera work?

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