The document discusses properties of electromagnetic radiation including light. It explains that light travels in waves at different speeds in different materials and can be reflected, refracted, or absorbed. Shorter wavelengths like ultraviolet, x-rays, and gamma rays have more energy than longer wavelengths like infrared, microwaves, and radio waves. The document also describes how light travels in straight lines and is bent by lenses, forming shadows and rainbows.

1. CHAPTER 14 SECTION 3

3. Electromagnetic Radiation
–a combination of electrical and magnetic
energy
• Like sound, light travels in waves that have
certain wavelengths and frequencies.
• Its speed is different in different materials.
• Light can be reflected or absorbed by certain
objects, or it can pass through them.

4. Electromagnetic Radiation
• Some types of electromagnetic radiation have
wavelengths that are shorter than those of
visible light.
ex: ultraviolet, x-ray, & gamma ray radiation
• Longer waves have lower frequencies and
lower energies.
ex: infrared waves, microwaves,
& radio waves.

5. How Does Light Move?
• Light travels the fastest in a vacuum.
• It travels more slowly through materials
such as air or water.
• Moves in straight lines.
• If it reflects off an object light still moves
in a straight line but in a different
direction.

6. • Light bends, or refracts,
whenever it enters a new
material
• White light that enters a prism
comes out separated into its
colors.
• A rainbow appears in the sky
when light reflects and refracts
in water droplets.

7. • An object in the path of light waves
casts a shadow.
• The object casting the shadow blocks
the path of light.
• A shadow is larger
when the object
is closer to the
light source.

8. CONCAVE vs. CONVEX
Convex Lens: A magnifying
glass contains a convex
lens that bends light rays
to make objects look larger.
Concave Lens: A concave
lens is thinner in the middle
than the edges. It can bend
light rays to make an object
look smaller.

10. Electromagnetic Radiation
–a combination of electrical and magnetic
energy
• Like sound, light travels in waves that have
certain wavelengths and frequencies.
• Its speed is different in different materials.
• Light can be reflected or absorbed by certain
objects, or it can pass through them.

11. Electromagnetic Radiation
• Some types of electromagnetic radiation have
wavelengths that are shorter than those of
visible light.
ex: ultraviolet, x-ray, & gamma ray radiation
• Longer waves have lower frequencies and
lower energies.
ex: infrared waves, microwaves,
& radio waves.

12. How Does Light Move?
• Light travels the fastest in a vacuum.
• It travels more slowly through materials
such as air or water.
• Moves in straight lines.
• If it reflects off an object light still moves
in a straight line but in a different
direction.

13. • Light bends, or refracts,
whenever it enters a new
material
• White light that enters a prism
comes out separated into its
colors.
• A rainbow appears in the sky
when light reflects and refracts
in water droplets.

14. • An object in the path of light waves
casts a shadow.
• The object casting the shadow blocks
the path of light.
• A shadow is larger
when the object
is closer to the
light source.

15. CONCAVE vs. CONVEX
Convex Lens: A magnifying
glass contains a convex
lens that bends light rays
to make objects look larger.
Concave Lens: A concave
lens is thinner in the middle
than the edges. It can bend
light rays to make an object
look smaller.