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 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 from normal • Waves moves into water • wave slows down • bends toward normal
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 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
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?
What are your observations?
Mythbusters
- Slides: 23