Effects of Electromagnetic Waves Light Temperature Scattering Absorption

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 • 6. P. 3. 2 Explain the effects of electromagnetic waves on various materials to include absorption, scattering, and change in temperature.

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?

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

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

Types of Electromagnetic Waves • There are 6 different types of Electromagnetic Waves ① Radio Waves ② Microwaves ③ Infrared Waves ④ Ultra-Violet Waves ⑤ X-Ray Waves ⑥ Gamma Waves • All different types of Electromagnetic waves have the differences

Electromagnetic Spectrum

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

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

White Light is different • Bill Nye the Science Guy S 01 E 16 Light and Color • https: //www. youtube. com/wa tch? v=XMVY 33 c. Z 9 To • Jerome Simpson on Bengals does Front Flip for Touchdown!!! [HD • http: //www. youtube. com/wat ch? v=Jq. Lm. J-l. DHEQ • White light is different because it is a MIXTURE of ALL the COLORS OF THE RAINBOW • Look at the jerseys of the players & other colors this all started as white light • White light shines down on every object just different objects reflect different lights and absorb the rest

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. co m/watch? v=YWYrjqf. Zq A 8 • Basketball absorbs all light except it reflects orange light (which is what we see)

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

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

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

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

Electromagnetic Waves (Light) Affect TEMPERATURE • Electromagnetic Waves affect Temperature in three ways • Temperature will change depending on… ① Intensity ② Duration ③ Absorption (Amount of Light)

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

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

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

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

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.

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