Do Now ◦ What do you think light is made up of? Is light matter?

Objective ◦ Students will be able to analyze and integrate information in order to explain light waves through a Webquest activity.

Agenda ◦ Do Now ◦ Expectations ◦ Webquest Activity

Expectations ◦ Do not go onto other websites. Complete the Webquest activity. ◦ If you are not following the rules or expectations, you will receive a zero on the assignment. THIS IS A LAB GRADE. ◦ Type in “Light Webquest” and go to the website: bquests/webquest6/ bquests/webquest6/

Webquest ◦ Read the text on the website and follow the next arrows when you finished each page. ◦ At step 4, go to the websites and read/complete the activity. ◦ Answer the reflection questions. ◦ If finished early today, go to the resources page and click one link. Give a summary of the webpage.

Do Now ◦ Why are we able to see light when it reaches the Earth?

Objective ◦ Students will be able to analyze and integrate information in order to describe what light is.

Agenda ◦ Do Now ◦ What is Light ◦ Section Review

Electromagnetic Waves ◦ Electromagnetic Waves – a wave that can travel through empty space or matter and consists of changing electric and magnetic fields

◦ These fields do not contain matter

Electric and Magnetic Fields ◦ Electric field surrounds every charged object ◦ Pulls oppositely charged objects toward it and repels like-charged objects

Electric and Magnetic Fields ◦ Magnetic fields surrounds every magnet ◦ Objects such as iron filings or paper clips are pulled towards magnets

◦d◦d

Electromagnetic (EM) Waves ◦ EM Waves produced by the vibration of an electrically charged particle ◦ When a particle vibrates, it moves back and forth causing the electric field around it to vibrate as well.

Electromagnetic (EM) Waves ◦ When the electric field starts to vibrate, the magnetic field starts to vibrate and the vibrations of both the electric and magnetic fields produces an EM wave.

EM Waves ◦ Radiation – the transfer of energy as electromagnetic waves

Speed of Light ◦ In the vacuum of space, the speed of light is 300,000,000 m/s, or 300,000 km/s. ◦ Scientists have yet to find anything that travels faster than this

Speed of Light ◦ Speed of light can be affected by the types of mediums, slower in air, glass. ◦ Still about 880,000 times faster than sound ◦ If you could run at the speed of light, you could travel around the Earth 7.5 times in 1 second

Calculations ◦d◦d

◦d◦d

Light from the Sun ◦ Takes about 8.3 minutes for light to travel from the Sun to the Earth ◦ They are 150,000,000 km away ◦ EM waves are a major source of energy on Earth ◦ Photosynthesis, fossil fuels store energy ◦ Only a small portion of the sun’s energy reaches Earth

Light ◦

Speed of Light Video ◦

Answer the following ◦ Electromagnetic waves are different from other types of waves because they can travel through… ◦ Describe light in terms of electromagnetic waves. ◦ Why is light from the sun important? ◦ How can electromagnetic waves be produced?

Answer the Following ◦ The distance from the sun to Jupiter is 778,000,000 km. How long does it take for light from the sun to reach Jupiter? ◦ Why is it important that EM waves can travel through empty space? ◦ How does the amount of energy produced by the sun compare with the amount of energy that reaches Earth from the sun?

Do Now ◦ How are EM waves produced?

Objective ◦ Students will be able to analyze and integrate information in order to explain what light is.

Agenda ◦ Do Now ◦ Review Light ◦ Directed Reading

Electromagnetic Waves ◦ Electromagnetic Waves – a wave that can travel through empty space or matter and consists of changing electric and magnetic fields

◦ These fields do not contain matter

Electric and Magnetic Fields ◦ Electric field surrounds every charged object ◦ Pulls oppositely charged objects toward it and repels like-charged objects

Electric and Magnetic Fields ◦ Magnetic fields surrounds every magnet ◦ Objects such as iron filings or paper clips are pulled towards magnets

Electromagnetic (EM) Waves ◦ EM Waves produced by the vibration of an electrically charged particle ◦ When a particle vibrates, it moves back and forth causing the electric field around it to vibrate as well.

Electromagnetic (EM) Waves ◦ When the electric field starts to vibrate, the magnetic field starts to vibrate and the vibrations of both the electric and magnetic fields produces an EM wave.

EM Waves ◦ Radiation – the transfer of energy as electromagnetic waves

Speed of Light ◦ In the vacuum of space, the speed of light is 300,000,000 m/s, or 300,000 km/s. ◦ Scientists have yet to find anything that travels faster than this

Complete the Directed Reading Activity

Do Now ◦ What type of wave is a tsunami?

Objective ◦ Students will be able to utilize information on waves in order to explain waves that affected Japan in 2012.

Agenda ◦ Do Now ◦ Expectations ◦ Compare and Contrast Notes ◦ Movie/Directed Reading

Expectations ◦ Very minimal talking during the movie, should be focused on the movie ◦ Watching the movie, not walking around the class or turning your head around to a peer ◦ If class or certain students cannot follow the rules, directed reading will be done instead

Compare and Contrast ◦ Complete a response comparing and contrasting what is true about tsunamis and what is different in the movie ◦ Write notes on what you watch or hear from the movie ◦ Create a T-Chart to compare and contrast

RealMovie

Do Now ◦ How does a tsunami get bigger when it reaches land?

Objective ◦ Students will be able to utilize information on waves in order to explain waves that affected Thailand in 2004.

Agenda ◦ Do Now ◦ Tsunami Assignment/Compare and Contrast ◦ The Impossible

Expectations ◦ Very minimal talking during the movie, should be focused on the movie ◦ Watching the movie, not walking around the class or turning your head around to a peer ◦ If class or certain students cannot follow the rules, directed reading will be done instead

Compare and Contrast ◦ Complete a response comparing and contrasting what is true about tsunamis and what is different in the movie ◦ Write notes on what you watch or hear from the movie ◦ Create a T-Chart to compare and contrast

Do Now ◦ What type of waves are we able to see from the EM spectrum?

Objective ◦ Students will be able to analyze and integrate information in order to explain the electromagnetic spectrum.

Agenda ◦ Do Now ◦ Test Monday ◦ EM Spectrum ◦ Exit Ticket

EM Spectrum ◦ Characteristics of EM Waves ◦ All EM waves travel at 300,000 km/s ◦ Wave Speed calculated by multiplying its wavelength by its frequency ◦ EM Spectrum is all of the frequencies or wavelengths of electromagnetic radiation

Do Now ◦ What are the colors of the rainbow in order?

Objective ◦ Students will be able to analyze and integrate information in order to explain the electromagnetic spectrum.

Agenda ◦ Do Now ◦ EM Spectrum ◦ Exit Ticket ◦ Test Monday

EM Spectrum ◦ Divided into regions according to the length of the waves

Radio Waves ◦ Have the longest wavelengths and the lowest frequencies of all EM waves ◦ Used for broadcasting signals ◦ Encode sound information into radio waves by varying either the waves amplitude or their frequency ◦ Changing amplitude or frequency is called modulation

Radio Waves ◦ AM radio waves have longer wavelengths and can bounce off the atmosphere and travel further than FM Radio waves ◦ FM radio waves are less affected by electrical noise

Radio Waves ◦ Televisions use radio waves that have shorted wavelengths and higher frequencies ◦ Use frequency-modulated waves to carry sound and amplitude-modulated waves to carry pictures

Microwaves ◦ Have shorter wavelengths and higher frequencies than radio waves ◦ Between 1 mm and 30 cm ◦ Cell phones and satellites use microwaves ◦ Radar detects speed and location of objects

Microwaves

Infrared Waves ◦ Shorter Wavelengths and higher frequencies than microwaves ◦ Between 700 nanometers and 1 mm ( m = 1 nm) ◦ Sun gives off infrared waves ◦ Waves absorbed by skin vibrates and you feel and increase in temperature

Infrared Waves ◦ All things give off infrared waves ◦ Warmer objects give off more

Visible Light ◦ Shorter wavelengths and higher frequencies than infrared waves ◦ Between 400 nm and 700 nm ◦ Visible light from the sun is white light, which is the visible light of all wavelengths combined ◦ Ex. Lamps

Visible Light ◦ Longest wavelength is Red, shortest is violet ◦ ROY G BIV ◦ Range of colors is called the visible spectrum

Visible Spectrum

Ultraviolet Light (UV) ◦ Produced by the sun ◦ Shorter wavelengths and higher frequencies than visible light ◦ Between 60 nm and 400 nm ◦ Can be good or bad for you body

UV Light ◦ Bad ◦ Cause sun burn ◦ Skin Cancer ◦ Wrinkles ◦ Damage to eyes ◦ Protection ◦ Use sunblock (high SPF) ◦ Sunglasses ◦ Hats ◦ Long-sleeved shirts ◦ Long pants

UV Light ◦ Good ◦ Kill bacteria on food and surgical tools ◦ Small amounts good for you body ◦ Helps skin cells produce vitamin D, which allows intestines to absorb calcium ◦ Some UV Light can travel through clouds

X Rays and Gamma Rays ◦ Have some of the shortest wavelengths and highest frequencies of all EM waves

X Rays ◦ Between nm and 60 nm ◦ Can pass through many materials ◦ Too much exposure can damage or kill living cells ◦ Cannot pass through lead ◦ Used at airports

Gamma Rays ◦ Shorter than 0.1 nm ◦ Move through most materials very easily ◦ Used to treat some forms of cancer ◦ Use rays to kill tumors, but may also damage healthy cells ◦ Kill harmful bacteria on food