1.6 THE EXPENDING UNIVERSE Flashcards
1
Q
The Doppler Effect is
A
the changed in the observed frequency of the wave, when the source or observer is moving
2
Q
formular of the doppler effect
A
fo=fs(v/v +(away) or - (towards) vs
v=speed of wave
3
Q
Redshift
A
is the chage in the wavelength devided by emmited wavelength
4
Q
MOVEMENT OF THE WAVELENGTH
A
- TOWARD BLUESHIFT WITH LOWER FREQUENCY AND LONGER WAVELENGTH
- AWAY REDSHIFT
5
Q
Hubble’s Law
A
Ho=v/d and t=1/Ho
s-1
6
Q
the age of the universe
A
13.7billion years
7
Q
The Origins of the Universe
A
- ** The Steady State Universe** where the universe had always been and would alwqays continue to be in existance
- The Created Universe(NOW REFERRED TO BIG BANG THEORY
8
Q
The peak wavelength is shotter
A
for hotter stars (BLUE)
red is cooler
9
Q
A HERTZSPRUNG-RUSSELL DIAGRAM
A
PLOTS THE BRIGHTNESS OR** LUMINOSITY** OF THE STARS
10
Q
EVIDENCE FOR THE BIG BANG THEORY
A
- Redshift and Expending Universe
- Cosmic Microwave Background Radiation
- Abudance of Hydrogen and Helium
- Olber’s Paradox
11
Q
THE FUTURE OF THE UNIVERSE
A
- Closed universe
- Open universe
12
Q
Dark matter
A
is the mass of the galaxies
13
Q
Dark Energy
A
is the energy which help universe to continue expending
less then weight
