Warmup What types of objects or materials can

Warm-up What types of objects or materials can reflect light? In your journals write down the objects or materials that you think reflect light.

• Get out your blue book and turn to page 19 - Fill in the guided reading sheet as you read

Cartoon • Create a cartoon using two of the concepts we have learned today or yesterday. • Make sure you read over your rubric so you know what I am looking for • Must be colorful!!!

Example

Warm up • A tuner is being used to tune a piano. The person tuning the piano can’t hear the sound coming from the tuner so he turns up the volume. Does the wave’s frequency, wavelength and/or amplitude change? • Then the tuner needs to increase the pitch of the sound so he turns up the pitch. Does the wave’s frequency, wavelength and/or amplitude change?

Waves Concept Review Lab • At each station you will work with your group to investigate the following concepts: • You will have 6 minutes per station

Reflection: when wave hits an object or surface and bounces off Example: echo

Reflection How come you can see a reflection in the picture with the mountain but not in the picture below?

Reflection Smoother surfaces = sharper images of reflection

$Refraction • The bending of a wave as it moves from one medium to$

Refraction • The bending of a wave as it moves from one medium to another. • Waves moves out Of Water = bends away from normal • Waves moves into water = bends toward normal

$Refraction • Waves moves out of Water • Wave speeds up • bends away$

Refraction • Waves moves out of Water • Wave speeds up • bends away from normal • Waves moves into water • wave slows down • bends toward normal

$Refraction$

Refraction

$Refraction$

Refraction

If you were to shoot at this fish where would you aim? Why? For help look at figure 13 on page 21

$Diffraction is the bending of waves around a barrier$

Diffraction is the bending of waves around a barrier

$Diffraction When a barrier is greater than or equal to the wavelength of a$

Diffraction When a barrier is greater than or equal to the wavelength of a wave then the wave will bend a lot more than a wave that has a wave length that it smaller than the barrier Example: sound and light bending around a door

$Diffraction$

Diffraction

Transmitted Wave • The part of the wave that passes right through the substance and out of the other side.

Constructive interference Two wave meets crest to form a wave with a greater amplitude.

Destructive interference Two waves meets crest to trough to form a wave with a smaller or no amplitude.

What are your observations?

Mythbusters