origin of the universe. origin and age of the universe humans have observed celestial objects for...
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Origin of the Universe
Origin and Age of the Universe
Humans have observed celestial objects for thousands of years contemplating their
place in the universe.
Celestial objects
The universeIt is estimated that the Universe is between 10 – 13.7 billion years old.
One theory explaining the origin
of the Universe is known as the Big
Bang Theory.
The Big Bang Theory
1. After the explosion, all matter began to organize into subatomic particles (protons/electrons) and small atoms (hydrogen and helium).
2. Within one billion years after the explosion, matter (atoms) became organized into celestial bodies.
3. These new celestial bodies developed gravitational fields. Stars and solar systems became grouped within these fields.
Evidence for the Big Bang Theory
1. RT = Pg.
14
Evidence for the Big Bang Theory
2.
The Doppler effect is a phenomena that illustrates the shifting wavelengths of electromagnetic energy from objects moving in an expanding universe.
RT = Pg. 14
The Doppler Effect
As the motorcycle moves closer to “Person A” the sound waves from the motorcycle compress (wavelengths decrease) – an increase in sound.
For “Person B” the sound waves are spread out (wavelengths increase) and there is a decrease in sound.
Person B Person A
As the universe continues to expand from the Big
Bang, the electromagnetic radiation of celestial
objects that are closest to the Earth have smaller
wavelengths (blue shift) than those that are
moving away from the Earth (long wavelength –
red shift).
wavelength wavelength
Spectral Evidence of The Doppler
Effect
A spectrometer is an instrument that will measure properties of light emitted from an element. Visible
light can broken down into the colored spectrum
Each element
produces a unique
spectrogram – a series of black bands
(spectral lines) placed across the
colored spectrum.
Spectral lines appear when
specific wavelengths on light are absorbed.