1. Light Continued

2. The light models explain how we…
See ____________
See ______________ in objects
______ see around corners
See ________
distant objects
apparent bends
Can’t
shadows

3. Light travels in ________ lines:
How do we see things?
Light travels in ________ lines:
straight
Laser

5. We see things because they ________ light into our eyes:
reflect
Astronomy

6. Part 2 - Reflection Reflection from a mirror: Mirror Normal
Incident ray
Reflected ray
Angle of incidence
Angle of reflection
Mirror

7. Angle of incidence = Angle of reflection
The Law of Reflection
Angle of incidence = Angle of reflection
In other words, light gets reflected from a surface at the same angle it hits it.
The same !!!

9. Color We can demonstrate this by splitting white light with a prism:
White light is not a single color; it is made up of a mixture of the seven colors of the rainbow.
We can demonstrate this by splitting white light with a prism:

10. Only red light is reflected
Seeing color
The color an object appears depends on the colors of light it ______.
reflects
Homework
White
light
Only red light is reflected

12. Refraction Refraction medium
_________ is when waves bend or change speed due to travelling in a different medium.
A _______ is something that waves will travel through.
medium

14. Shadows
Shadows are places where light is “_______”:
blocked
Rays of light

15. Shadow(s) Light from a single direction. Sun-light. Has one shadow
Two light sources
Two shadows

16. Life of a Photon – 4 Steps ________ - released
___________ – pass through an object
Air, glass, water, plastic, space
_____________ – reflect off surface of objects
________ – ultimately photons strike an object and disappear
Emitted
Transmitted
Bounce/Scatter
Absorbed

17. How light or electromagnetic radiation is used in Astronomy
Astronomers use a tool called a spectroscope to separate starlight into its colors – in this way, they can tell what a star is made of, its temperature, luminosity and so on…
Astronomers can look at astronomical objects at different wavelengths…