1. WAVES

2. REMEMBER!!!!!
Mechanical waves are waves that require a medium. This means that they have to have some sort of matter to travel through. These waves travel when molecules in the medium collide with each other passing on energy. One example of a mechanical wave is sound. Sound can travel through air, water, or solids, but it can't travel through a vacuum.
Electromagnetic waves are transverse waves that can travel through a vacuum (empty space). They don't need a medium or matter. They travel through electrical and magnetic fields that are generated by charged particles. Examples of electromagnetic waves include light, microwaves, radio waves, and X-rays. 

3. Types of Waves
Longitudinal Waves
&
Transverse Waves

4. Longitudinal waves are waves in which the displacement of the medium is in the same direction as, or the opposite direction to, the direction of propagation of the wave. Mechanical longitudinal waves are also called compressional or .compression waves
Transverse waves are waves in which the displacements of the medium are at right angles to the wave direction.

5. Is Light Really a Wave?

7. seven colors
There are seven colors in the rainbow: red, orange, yellow, green, blue, indigo and violet.

8. Light waves are Transverse Waves. Why?
Two Types of Waves
Longitudinal Waves
&
Transverse Waves
Light waves are Transverse Waves. Why?

9. Electromagnetic Spectrum

10. The human eye can distinguish about 10 million different colors

11. What makes a Rainbow?
A rainbow is a meteorological phenomenon that is caused by reflection, refraction and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky. It takes the form of a multicoloured  arc. Rainbows caused by sunlight always appear in the section of sky directly opposite the sun.

12. There are many types of rainbows!

13. Rainbow After the Rain

14. Rainbows can form in mist, such as that of a waterfall.

15. Rainbows may form in the spray created by waves (called spray bows).

16. END OF THE RAINBOW

17. Choose a type of rainbow and background and draw/color it.
Remember to include the seven colors of a rainbow
and label the Wavelengths of each by using the information
below. Make sure your rainbow colors are in the correct order!
Violet: 400 nm
Indigo : 445 nm
Blue: 475 nm
Green: 510 nm
Yellow: 570 nm
Orange: 590 nm
Red: 650 nm