Unit C Chapter 1 - Ideas of Light & Optical Devices

How did Pythagoras explain how we see light?

• Light reflects off of objects into our eyes

• Light beams come from our eyes and when the light reaches an object, that is when we see it.

What is the problem with Pythagoras' theory?

Euclid discovered that when light reflects, the angles are _____.

Refraction is when

• Light bounces off of an object

• Light bends

• Light disappears

What did al-Hytham discover?

Draw how the speed of light was discovered

What is the difference between a reflecting telescope and a refracting telescope?

What is an advantage of a reflecting telescope over a refracting telescope?

• The lenses are more sturdy

• Refracting telescope shows the images upside down

• The mirrors can be larger

• Both b and c

Why do binoculars use prisms?

Draw a reflecting telescope