Light Spectra
This "tool" was used to determine if galaxies were experiencing a redshift or blueshift.
Answer: What is an absorption spectrum?
As the source moves away, wavelengths....
What is lengthen?
This evidence is used to show the universe was once smaller and is now expanding.
What is light spectra?
CMBR stands for...
What is Cosmic Microwave Background Radiation?
These two elements make up the majority of the elements inthe universe.
What is Hydrogen and Helium?
Lengthening wavelengths appear on an absorption spectrum as a .....
What is a redshift?
As the source moves closer, wavelengths...
What is shorten?
This evidence shows the universe had to be hotter and is cooling over time.
What is CMBR?
The current temperature of the CMBR.
What is 2.7K?
This process generated the initial light elements in the universe and lasted less than 3 minutes.
What is Big Bang Nucleosynthesis?
A redshift refers to this type of motion.
What is moving away?
Wavelength shortens, frequency...
What is increase?
This evidence was predicted by Big Bang theorists before it was found.
What is CMBR?
What did the CMBR come from?
What is The Big Bang/the initial singularity that expanded?
This process converts light elements into heavier elements and occurs in stars.
What is stellar nucleosynthesis?
This phenomenon was used to understand why the spectra of distant objects were changing.
What is the doppler effect?
Wavelength lengthens, frequency...
What is decreases?
The universe is estimated to be...
What is 13.8 billion years old?
CMBR was released ...
What is 380,000 years after the Big Bang began?
This law supports the idea of matter conversion.
What is the law of conservation of matter?
This "law" basically states the further away the galaxy, the greater the redshift, the faster its is moving away.
What is Hubble's Law?
Doppler effect is used to explain..
What is how objects are moving when examining light spectra?
Expansion is evident by looking at...
What is absorption spectra from distant galaxies?
CMBR tells us the universe is ___________ over time.
What is cooler?
Elemental composition tells us the universe was once ___________ and _____________.
What is hotter and denser?