1.6 THE EXPENDING UNIVERSE

Question 1

The Doppler Effect is

Answer 1

the changed in the observed frequency of the wave, when the source or observer is moving

Question 2

formular of the doppler effect

Answer 2

fo=fs(v/v +(away) or - (towards) vs

v=speed of wave

Question 3

Redshift

Answer 3

is the chage in the wavelength devided by emmited wavelength

Question 4

MOVEMENT OF THE WAVELENGTH

Answer 4

1. TOWARD BLUESHIFT WITH LOWER FREQUENCY AND LONGER WAVELENGTH
2. AWAY REDSHIFT

Question 5

Hubble’s Law

Answer 5

Ho=v/d and t=1/Ho

s-1

Question 6

the age of the universe

Answer 6

13.7billion years

Question 7

The Origins of the Universe

Answer 7

1. ** The Steady State Universe** where the universe had always been and would alwqays continue to be in existance
2. The Created Universe(NOW REFERRED TO BIG BANG THEORY

Question 8

The peak wavelength is shotter

Answer 8

for hotter stars (BLUE)

red is cooler

Question 9

A HERTZSPRUNG-RUSSELL DIAGRAM

Answer 9

PLOTS THE BRIGHTNESS OR** LUMINOSITY** OF THE STARS

Question 10

EVIDENCE FOR THE BIG BANG THEORY

Answer 10

1. Redshift and Expending Universe
2. Cosmic Microwave Background Radiation
3. Abudance of Hydrogen and Helium
4. Olber’s Paradox

Question 11

THE FUTURE OF THE UNIVERSE

Answer 11

1. Closed universe
2. Open universe

Question 12

Dark matter

Answer 12

is the mass of the galaxies

Question 13

Dark Energy

Answer 13

is the energy which help universe to continue expending

less then weight