Waves

Mr. King

What are WAVES?

• 1. The definition of a wave is?

• Energy that causes something to move a distance.

• 2. List some waves we will be exploring in this unit.

• Sound, Earthquakes & Light.

• What is the difference between a transverse waves and a compression wave? Which one of these us a sound wave?

• Sound waves uses both.

Transverse Wave

Compression Wave

4. What type of wave did your air cannon use?

• A compression wave.

• Using the words “crest”, “trough”, “amplitude”, “ and “wavelength”, draw pictures explaining these parts of a wave.

• Using the words “crest”, “trough”, “amplitude”, “ and “wavelength”, draw pictures explaining these parts of a wave.

Crest

• Using the words “crest”, “trough”, “amplitude”, “ and “wavelength”, draw pictures explaining these parts of a wave.

Crest

Trough

• Using the words “crest”, “trough”, “amplitude”, “ and “wavelength”, draw pictures explaining these parts of a wave.

Crest

TroughWavelength

• Using the words “crest”, “trough”, “amplitude”, “ and “wavelength”, draw pictures explaining these parts of a wave.

Crest

TroughWavelength

Amplitude

Light

• Explain the words ultraviolet and infrared. Where does this fit in the visible spectrum?

Light

• Explain the words ultraviolet and infrared. Where does this fit in the visible spectrum?

Light

• Explain the words ultraviolet and infrared. Where does this fit in the visible spectrum?

spectrum

Light

• Explain the words ultraviolet and infrared. Where does this fit in the visible spectrum?

Spectrum

Visible Spectrum

R O Y G B I V

Light

• Explain the words ultraviolet and infrared. Where does this fit in the visible spectrum?

Spectrum

Visible Spectrum

R O Y G B I V

Infrared

Light

• Explain the words ultraviolet and infrared. Where does this fit in the visible spectrum?

Spectrum

Visible Spectrum

R O Y G B I V

Infrared Ultraviolet

• 2. What is the difference between incandescent and fluorescent?

• Fluorescent uses gas in a light bulb and incandescent uses a filament a solid material that gets hot.

• 3.What is the speed of light?• 300,000 km per second.• 4. Distinguish between opaque, translucent and

transparent.• Opaque, light can’t travel through. Transparent

is clear, light almost totally goes through. Translucent is like some light can go through.

5. Draw a picture of a convex mirror and a concave mirror. Include light rays and label the focal point.

5. Draw a picture of a convex mirror and a concave mirror. Include light rays and label the focal point.

5. Draw a picture of a convex mirror and a concave mirror. Include light rays and label the focal point.

Convex

5. Draw a picture of a convex mirror and a concave mirror. Include light rays and label the focal point.

Convex Concave

Which one of these mirrors will have a focalPoint? What will the light rays do?

5. Draw a picture of a convex mirror and a concave mirror. Include light rays and label the focal point.

Convex Concave

Which one of these mirrors will have a focalPoint? What will the light rays do?

5. Draw a picture of a convex mirror and a concave mirror. Include light rays and label the focal point.

Convex Concave

Which one of these mirrors will have a focalPoint? What will the light rays do?

5. Draw a picture of a convex mirror and a concave mirror. Include light rays and label the focal point.

Convex Concave

Which one of these mirrors will have a focalPoint? What will the light rays do?

5. Draw a picture of a convex mirror and a concave mirror. Include light rays and label the focal point.

Convex Concave

Which one of these mirrors will have a focalPoint? What will the light rays do?

5. Draw a picture of a convex mirror and a concave mirror. Include light rays and label the focal point.

Convex Concave

Which one of these mirrors will have a focalPoint? What will the light rays do?

5. Draw a picture of a convex mirror and a concave mirror. Include light rays and label the focal point.

Convex Concave

Which one of these mirrors will have a focalPoint? What will the light rays do?

5. Draw a picture of a convex mirror and a concave mirror. Include light rays and label the focal point.

Convex Concave

Which one of these mirrors will have a focalPoint? What will the light rays do?

5. Draw a picture of a convex mirror and a concave mirror. Include light rays and label the focal point.

Convex Concave

Which one of these mirrors will have a focalPoint? What will the light rays do?

5. Draw a picture of a convex mirror and a concave mirror. Include light rays and label the focal point.

Convex Concave

Which one of these mirrors will have a focalPoint? What will the light rays do?

Focal Point

Can you give me an example of both a convex and concave Mirror? Which one would you use in a solar collector?

• 6. What is refracted light? Give an example of this.•Light that goes through two different mediums - (a medium is •Like air, water or glass.

• 7. Draw and label some lenses here.

Can you give me an example of both a convex and concave Mirror? Which one would you use in a solar collector?

• 6. What is refracted light? Give an example of this.•Light that goes through two different mediums - (a medium is •Like air, water or glass.

• 7. Draw and label some lenses here.

Can you give me an example of both a convex and concave Mirror? Which one would you use in a solar collector?

• 6. What is refracted light? Give an example of this.•Light that goes through two different mediums - (a medium is •Like air, water or glass.

• 7. Draw and label some lenses here.

Which one of these lenses will focus?

Can you give me an example of both a convex and concave Mirror? Which one would you use in a solar collector?

• 6. What is refracted light? Give an example of this.•Light that goes through two different mediums - (a medium is •Like air, water or glass.

• 7. Draw and label some lenses here.

Which one of these lenses will focus?

Can you give me an example of both a convex and concave Mirror? Which one would you use in a solar collector?

• 6. What is refracted light? Give an example of this.•Light that goes through two different mediums - (a medium is •Like air, water or glass.

• 7. Draw and label some lenses here.

Which one of these lenses will focus?

Can you give me an example of both a convex and concave Mirror? Which one would you use in a solar collector?

• 6. What is refracted light? Give an example of this.•Light that goes through two different mediums - (a medium is •Like air, water or glass.

• 7. Draw and label some lenses here.

Which one of these lenses will focus?

Can you give me an example of both a convex and concave Mirror? Which one would you use in a solar collector?

• 6. What is refracted light? Give an example of this.•Light that goes through two different mediums - (a medium is •Like air, water or glass.

• 7. Draw and label some lenses here.

Which one of these lenses will focus?

Can you give me an example of both a convex and concave Mirror? Which one would you use in a solar collector?

• 6. What is refracted light? Give an example of this.•Light that goes through two different mediums - (a medium is •Like air, water or glass.

• 7. Draw and label some lenses here.

Which one of these lenses will focus?

Can you give me an example of both a convex and concave Mirror? Which one would you use in a solar collector?

• 6. What is refracted light? Give an example of this.•Light that goes through two different mediums - (a medium is •Like air, water or glass.

• 7. Draw and label some lenses here.

Which one of these lenses will focus?

• 8. What good are lenses? Give at least 5 examples.

• Glasses for vision, make fire, projectors ext.

• 9. Explain the difference between a farsighted person and a nearsighted person. Use a drawing to explain this.

Far sighted

Near sighted Both unfocused

Far sighted

Near sighted Both focused

Glasses or contacts

• 10. What scientific principle is explained using a prism?•Color Refraction

• 10. What scientific principle is explained using a prism?•Color Refraction

• 10. What scientific principle is explained using a prism?•Color Refraction

R O

Y G

B I

V

• 10. What scientific principle is explained using a prism?•Color Refraction

R O

Y G

B I

V

This makes a rainbow.

• 11. What does the word Laser stand for? How are lasers used today?

• Light Amplification by Simulated Emissions or Radiation. Lasers are used in surgery and manufacturing. Also in weapons.

• 12. How are radio waves related to light waves?

• Longer wave length is a radio wave. Shorter ones are light waves.

Sound

• 1. What two things do you need for sound to be heard?

• A vibration and a medium (anything sound can travel through-air-water)

• 2. What is sound made up of?• Compressed medium• 3. What does an oscilloscope do?• Measures pitch or wavelength of the sound also

the amplitude.

Crest

TroughWavelength

Amplitude

Remember this?

• 4. Explain how sound travels through air, space, steel or water.

• Air - slow• Space - does not travel at all• Water - somewhat fast• Steel - very fast• 5. What materials could you use to absorb

sound, why would you want to absorb sound? Where does the sound energy go?

• Fiberglass sound board is very good because the fiberglass vibrates and heats up. This is used to quiet room.

• 6. What does SONAR stand for?• Sound Navigation Ranging• 7. What is the speed of sound? Compare this to

the speed of light.• Solid - 5000 meters/second• Water - 1460 meters/second• Air - 335 meters/second• Compared to light which is 300,000,000

meter/second• 8. Define frequency, ultrasonic and pitch • how fast a wave travels or how many cycles per

second. Defined in Hertz• Ultrasonic is up to and over 20,000 Hertz & pitch

is high and low notes.

Use the examples below to answer questions.

A B

CD

E F

• 9. Explain Doppler Effect.

• Change in sound as it comes near a person, passes them and continues to go.

• 10 What is the intensity of amplitude of sound measured in?

• Decibels is the measure of intensity or loudness of a sound.

• 9. Explain Doppler Effect.

• Change in sound as it comes near a person, passes them and continues to go.

• 10 What is the intensity of amplitude of sound measured in?

• Decibels is the measure of intensity or loudness of a sound.

Loud sound - Quiet sound - same tone