1. Waves and the Electromagnetic Spectrum

2. WAVES
A wave is a disturbance that transfers energy from place to place.
All mechanical waves move through a medium; for example sound waves move through air.

3. Two types of waves
Longitudinal - particles move back and forth like a slinky
Transverse waves – waves move up and down

4. Frequency is the number of waves produced in a given amount of time
Frequency is the number of waves produced in a given amount of time. High frequency means more energy and low frequency is less

6. The Electromagnetic Wave
An electromagnetic wave is a disturbance in electric and magnetic fields.

7. RedOrangeYellowGreenBlueIndigoViolet
Visible light is a small portion of this spectrum. This is the only part of this energy range that our eyes can detect. What we see is a rainbow of colors.
RedOrangeYellowGreenBlueIndigoViolet
ROY G BIV

8. Which color of visible light has the lowest frequency
Which color of visible light has the lowest frequency? Which color of visible light has the highest frequency?

9. LIGHT Light is a kind of energy that travels in waves.
Light can pass through some things, but not others.

10. Transparent
Objects that let all light pass through are called transparent.
Examples: clear glass, eyeglasses, window, fish tank, clear plastics, and transparent tape.

11. TRANSLUCENT
An object that lets some light pass through is called translucent.
Examples: waxed paper, sunglasses, frosted glass, and thin fabrics.

12. OPAQUE An object that lets NO light pass through is called opaque.
Examples: rock, metal, wood, fog, aluminum foil, thick paper, and brick.

13. Reflection
Reflection is when light or an image bounces back off an object’s surface.
Light can bounce back off an opaque object.

14. Refraction
The change in direction of a wave as it passes from one medium into another at an angle
Start 2A here

15. Must show where the light hits and Exits the glass. Where could it exit?
AIR A. B. Water C. Light