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Effects of Electromagnetic Waves

Effects of Electromagnetic Waves. Light: Temperature, Scattering & Absorption. Essential Standards. 6.P. 3 Understand characteristics of energy transfer and interactions of matter and energy. Clarifying Objectives.

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Effects of Electromagnetic Waves

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  1. Effects of Electromagnetic Waves Light: Temperature, Scattering & Absorption

  2. Essential Standards • 6.P.3 Understand characteristics of energy transfer and interactions of matter and energy.

  3. Clarifying Objectives • 6.P .3.2 Explain the effects of electromagnetic waves on various materials to include absorption, scattering, and change in temperature.

  4. Essential Questions • How does light influence TEMPERATURE of an object? • How does the sun’s energy arrive as light? • How does light ABSORB matter? • How does light SCATTER matter?

  5. Light Waves • Electromagnet waves transmit/transfer energy in light waves • Light is Photon ENERGY that travels through WAVES • These waves are Electromagnetic Waves • These Electromagnetic Waves create the Electromagnetic Spectrum

  6. Photons • Photons are particles that have a 0 mass • Electromagnetic waves are carried through the electromagnetic spectrum by photons • These photons can move through mediums but do not need to • They can pass through vacuums

  7. Types of Electromagnetic Waves • There are 6 different types of Electromagnetic Waves • Radio Waves • Microwaves • Infrared Waves • Ultra-Violet Waves • X-Ray Waves • Gamma Waves • All different types of Electromagnetic waves have the differences

  8. Electromagnetic Spectrum

  9. Effects of Wavelengths • Shorter Wavelength = more Energy • Shorter Wavelength = more Photons • Shorter Wavelength = more Intensity

  10. The Sun • The sun’s wavelength energy comes to the Earth in 3 ways • These 3 waves come in different wavelengths

  11. White Light is different • http://www.youtube.com/watch?v=gtgBHsSzCPE • White light is different because it is a MIXTURE of ALL the COLORS OF THE RAINBOW • White light shines down on every object just different objects reflect different lights and absorb the rest • http://www.youtube.com/watch?v=JqLmJ-lDHEQ • Look at the jerseys of the players & other colors this all started as white light

  12. White Light is different • All white light goes through a natural prism as it enters the earth’s atmosphere and different objects absorb & reflect different colors • http://www.youtube.com/watch?v=YWYrjqfZqA8 • Basketball absorbs all light except it reflects orange light (which is what we see)

  13. Essential Questions • Get with a partner and answer… • How does the sun’s energy arrive as light?

  14. Electromagnetic Waves (Light) Affect ABSORPTION • Absorption is the opposite of reflection • If light is not absorbed it is reflected • Absorption is how many of the photons of light are going into a material • The darker a material is the more absorption will take place

  15. Electromagnetic Waves (Light) Affect SCATTERING • Scattering of Electromagnetic waves is when light hits particles and scatters everywhere • Light as it is coming down is white as we know when it hits something it scatters

  16. Essential Questions • Get with a partner and answer… • How does light ABSORB matter? • How does light SCATTER matter?

  17. Electromagnetic Waves (Light) Affect TEMPERATURE • Electromagnetic Waves affect Temperature in three ways • Temperature will change depending on… • Intensity • Duration • Absorption (Amount of Light)

  18. Electromagnetic Waves (Light) Affect TEMPERATURE [Intensity] • Intensity of light is the #number of PHOTONS being emitted by a light source • The more INTENSE (photons) the light is the hotter the temperature will be

  19. Electromagnetic Waves (Light) Affect TEMPERATURE [Absorption] • Absorption is the opposite of reflection • Absorption is how many of the photons of light are going into a material • The darker a material is the more absorption will take place • http://www.youtube.com/watch?v=gtgBHsSzCPE • 3:40-4:04

  20. Electromagnetic Waves (Light) Affect TEMPERATURE [Duration] • Duration is the AMOUNT OF TIME that the light wave (photons) is shining on the object • For example in the summer time the DURATION or time of light is more • In the winter time the DURATION of light is shorter • The longer the DURATION the higher the temperature will be

  21. Essential Questions • Get with a partner and answer… • How does light influence TEMPERATURE of an object?

  22. EOG Questions • During the day, the sand at the beach is very warm; while at night, it is cooler. Why does this occur? • A) The sand reflects the sun’s energy during the day, causing it to become warmer. • B) The sand absorbs the sun’s energy during the day, causing it to become warmer. • C) The sand scatters the sun’s energy during the day, causing it to become warmer. • D) The sand refracts the sun’s energy during the day, causing it to become warmer.

  23. Important Points • Electromagnetic Waves are either Reflected or Absorbed • Absorption is how many photons from waves are transfer into a material • Temperature depends on • Duration of light • Absorption of light waves • Intensity of light waves • Scattering is when light waves no longer travel in a straight line & start reflecting every which way • The sun transmits energy through • Infrared • Visible • Ultra violet • White light carries all the colors of the rainbow and is always scattered

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