Wave Top 12!.

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Presentation transcript:

Wave Top 12!

1. Diagram the parts of a transverse wave.

2. What does a wave carry? ENERGY!!

3. What is a medium (media)? substance through which a wave can travel (solid, liquid, or gas)…medium is singular…media is plural LIQUID GAS

4. What are the different types of waves(4)? Cite SPECIFIC examples! Mechanical (sound & seismic waves) Electromagnetic (Visible Light & Microwaves) Transverse (ALL electromagnetic waves…think of water waves for a visual!) Longitudinal (ALL sound waves!)

5. What are the properties/characteristics of the different types of waves? (slide 1 of 2) Mechanical: Waves that require a medium to travel (Examples: sound and seismic waves) Electromagnetic: Waves that DO NOT require a medium to travel (Examples: Visible Light and Microwaves)

5. What are the properties/characteristics of the different types of waves? (slide 2 of 2) Transverse: looks like a rope being moved; contains crests (the high point of the wave) and troughs (the lowest point of the wave). Water waves are transverse waves, but ALL Electromagnetic waves are considered to also be transverse! Longitudinal: looks like a slinky or spring; contains compressions (areas where the coils are tightly pressed together) and rarefactions (areas where the coils are spread apart). Sound is a longitudinal wave.

6. How do the properties of a wave interact. (Frequency vs 6. How do the properties of a wave interact? (Frequency vs. Wavelength) Slide 1 of 3 Wavelength – distance from crest to crest or trough to trough, measured the same in both types of waves. Wavelength can be calculated by multiplying wave speed times frequency; measured in meters More energy = shorter wavelength Less energy = longer wavelength Amplitude – height of a wave from a rest position - can be measured from rest position to the top of the crest or rest position to bottom of trough

6. How do the properties of a wave interact. (Frequency vs 6. How do the properties of a wave interact? (Frequency vs. Wavelength) Slide 2 of 3 Frequency – number of waves produced in a given amount of time Calculated by dividing wave speed by wavelength, measured in Hertz (Hz) Higher frequency = more energy Lower frequency = less energy

6. How do the properties of a wave interact. (Frequency vs 6. How do the properties of a wave interact? (Frequency vs. Wavelength) Slide 3 of 3 Frequency and Wavelength Compared – as frequency increases, wavelength decreases – they are inversely proportionate DRAW this diagram on your sheet… wavelength wavelength

7. Label the parts of a longitudinal wave.

8. What can a wave do. What are wave interactions (4) 8. What can a wave do? What are wave interactions (4)? Cite examples of each! Slide 1 of 2 Reflection – wave bounces back after hitting a barrier An echo is a sound wave reflecting Refraction – bending of a wave as the wave goes from one medium to another at an angle – this is how we see a rainbow using a prism or after a rain shower. This is caused by the wave changing speed as it changes medium.

8. What can a wave do. What are wave interactions (4) 8. What can a wave do? What are wave interactions (4)? Cite examples of each! Slide 2 of 2 Diffraction –bending of waves around a barriers or through an opening – this why you can hear music before you can see it Absorption – the transfer of light energy to particles of matter (like soaking up energy/waves)

9. How do we calculate wave speed (units too!) Wave Speed – the speed at which a wave travels. (Speed is DISTANCE over TIME…sing along) Calculated by multiplying wavelength times frequency ( OR distance divide by time), measured in meters per second More on this soon!

10. What are the 2 types of interference? Give examples of each. Constructive Interference: crests or troughs overlap…energy is combined…new wave has higher crests and deeper troughs – larger amplitude. Destructive Interference: crest from one & trough from another overlap…smaller amplitude – possibly destroy wave.

11. How are standing waves created? List examples. Standing Waves: caused by loops of interference…looks like wave is not moving – formed from transverse waves (like a guitar string) and longitudinal waves. We will see a FANTASTIC visual of this soon

12. What is resonance? Give SPECIFIC examples. Resonance: object vibrates and causes another object to vibrate (Examples: mirror with bass sound, drums, singing in shower, xylophone, etc.)