Wave Interactions

1
WaveInteractions

• The behavior of waves

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Waves Have 4 Types of Interactions (436 -439)

• Reflection (bounces) (mirror)
• Refraction (broken) (water)
• Diffraction (bends) ) ) ) ) )
• Music and water bend
• Interference (where 2 waves meet) Music / Noise
• Constructive (builds up)
• Same note/same key (Tsunami)
• Destructive (Tears down)
• Different note/different key
• Resonance waves
• Waves can have Absorption
• Take in like a sponge (especially light)

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Wave Characteristics pgs. 432 - 435

• Wave height the height from the top of a crest
  to the bottom of a crest
• Amplitude half of the wave height or the
  resting place
• Wavelength the length from one crest to another
  crest
• Frequency the number of waves produced in a
  given amount of time
• Trough the lowest part of a wave
• Crest the top of a wave

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Wave Characteristics

• More frequency Less frequency
• The higher the frequency the more energy it
  carries!

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Wave Characteristics

• Resonance pg. 441
• When the frequency of one object matches the
  frequency of the second object!
• Standing Waves pg. 440
• Forms a stationary pattern looks like it is
  standing still.

6
Light WavesChapter 17 pgs. 474 - 494

• Light is an EM (Electromagnetic) Wave
• Light or EM waves do not need a medium to travel
  on.
• Light is a form of energy
• EM Waves travel through a Transverse wave
• The energy then moves up and down
• Photons are bursts of light from released energy
• Radio Waves (EM) travel in 2 ways
• FM Frequency modulation (close together)
• AM Amplitude modulation (uses wave height

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Light WavesChapter 17 pgs. 474 - 494

• Microwaves are used in cooking and radar
• Visible light are EM waves that we see
  (especially all colors)
• ROYGBIV
• Red, orange, yellow, green, blue, indigo, and
  violet
• UV (Ultraviolet) are the rays we use to tan, but
  too much causes cancer
• X-Rays are used to look for broken bones and
  pneumonia
• Gamma Rays have the highest amount of energy and
  are used to treat cancer

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Light Characteristicspg. 495 - 500

• Light can be
• Reflected
• Absorbed
• Transmitted (pass through)
• Matter types
• Transparent (see through)
• Translucent (scatters light)
• Opaque (can not see through)
• Colors are light wavelengths that are reflected,
  absorbed, or transmitted
• We see which wavelength reaches our eyes

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Atoms in Light Energy

• Atoms contain electrons in the outer orbitals
  that surround the nucleus
• The nucleus contains protons and neutrons
• The protons contain a positive charge
• The Electrons contain a negative charge
• The neutrons have NO charge
• The sharing of electrons releases the form of
  energy as photons or LIGHT!

10
Light in Color

• Light comes in primary colors
• Red, Green, Blue
• Pigment is a material that gives something its
  color by absorbing some colors of light and
  reflecting others!
• Secondary colors are two primary colors together
• Ex. Red Green yellow

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Light Sources

• Luminous produces light
• Incandescent produces light by an hot object
  (such as a wire in light bulb)
• Fluorescent produces light when electrical
  current passes through a gas (such as)