2. Key Terms:
Big Bang Theory: the most commonly accepted theory explain the creation of the universe
Red shift: stating that everything in the universe is moving away from each other
Blue shift: stating that objects are getting closer – moving toward each other
Electromagnetic Spectrum: the range of wavelengths or frequencies over which radiation (light) extends.
Edwin Hubble: Developed the idea of the Red Shift in 1929 based on a study of the light received from the distant galaxies.
Spectroscope: a tool used to measure the wavelengths of light.
Angstrom: a unit used to represent wavelengths of light (color)

3. The Big Bang Theory
The Big Bang Theory is the leading explanation about how the universe began.
It was the creation of time and space – time and space did not exist before this point.
In the most general terms, it talks about the universe as we know it starting with a small point of singularity, then inflating over the next 13.8 billion years to the cosmos that we know today

5. The Big Bang – Brain Pop QUESTIONS: How old is our universe?
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QUESTIONS:
How old is our universe?
What did the Big Bang (cosmic explosion) create?
How does the raisin bread example relate to the Big Bang?

6. Understanding the Evidence that Proves the Big Bang…

7. Electromagnetic Spectrum– Brain Pop
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8. Regular view UV wavelength light

9. Electromagnetic Spectrum (The EM Spectrum)
Displays all types of light
Visible light is only a small portion of this spectrum
The type of wave depends on the frequency that the light is traveling.

10. Frequency

11. Electromagnetic Spectrum
Higher Frequency
Lower Frequency

12. White Light - (Visible Light)
Light is made up of all of the colors of the rainbow
ROY G BIV
Red is lowest frequency – what color are the coolest burning stars?
RED
Violet is highest frequency – what color are the hottest burning stars?
BLUE/VIOLET
White light can be refracted (bent) to expose all colors in a frequency using a prism

14. Refraction of Light Through a Spectrum
Short waves (high frequency) bends more than long waves (low frequency)
Prism

15. The Angstrom Unit for measuring color wavelength
What is your favorite color?

16. Three Types of Spectra

17. Continuous Spectrum Full spectrum rainbow.
Created by pure white light being broken into different colors

18. Emission Spectrum (Bright Line Spectrum)
Every gas produces its own specific wavelengths of light when glows.
When the light is broken down, only a few colors are present in the spectrum.
No two gases have like spectrum. Acts as a fingerprint. H

19. Absorption Spectrum
When white light passes through a gas and certain wavelengths are absorbed.
Only the frequencies of that certain gas are absorbed
Once again, the spectrum is the fingerprint of that gas H

20. Spectra (Fingerprint) for Hydrogen
Emission Spectrum
Absorption Spectrum
The lines are in the identical places!

21. Elements and their Spectrum

22. Elements may have similar spectrum, but no two elements share the same.
BROMINE
NEON
CHLORINE
BORON

23. Spectrum Lab Split class into 2 groups
Group 1 pHet simulation- Simulation
Group 2 - spectroscopes

24. Flash Light Demo

25. Understanding the Red Shift
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What happens to the frequency of the waves as an object as it approaches us?
What happens to the frequency of an object as an object as it moves away from us?
What color has the highest frequency?
What color has the lowest frequency?
How can we use the Doppler Effect (Red Shift) to explain the Big Bang?

26. What happened to the spectrum of this star over time
What happened to the spectrum of this star over time? Which way did it move? What’s happening?

27. Week 31 Wednesday 4/5/17 Question:
How does the Red Shift explain the Big Bang?
Answer:
Objects moving away lose frequency – it shifts towards the wavelength of RED – galaxies appear slightly red – if we reverse the path of the galaxies, it leads back to a point of singularity.

28. gain frequency and move towards usB F E A G
gain frequency and move towards us C
SPACE
TIME
14 billion years old
RED
Visible light