Hubbles Law

As an object in space moves away from an observer, the wavelengths of light waves produced by the object are lengthened.

• Cosmic Microwave Background Radiation

• Red Shift

• Gamma Ray Radiation

• Blue Shift

Which of the following IS NOT true about Hubbles Law?

• The Universe is Expanding

• Galaxies are all moving away at Equal Rates

• Galaxies are Accellerating away from us depending on there distance from us

• Most of the Galaxies in the Universe are moving away from us

Based on Hubbles Law, What can you infer about each of the galaxies based on the diagram

• All the galaxies are moving away at equal rates

• Galaxy A and B are moving away while Galaxy C is moving closer

• All the Galaxies are moving away, but Galaxy C must be the most distant based on its amount of shift

• There isn't enough information to draw upon a conclusion

What is Hubble's Law?

• Hubble's Law is a law of physics that states that the universe is constantly expanding
• Hubble's Law is a law of physics that states that the universe is constantly contracting
• Hubble's Law is a law of physics that states that the universe is static
• Hubble's Law is a law of physics that states that the universe is constantly rotating

Red-Shift: Light moving _____

• away from the observer
• towards the observer
• in a circular path
• in a straight line

Blue-Shift: Light moving _____

• away from the observer
• in a straight line
• in a circular path
• towards the observer

What is the current accepted age of the universe according to many Big Bang cosmologists?

• 13.8 billion years
• 10.4 billion years

• 15.4 billion years

• 20.9 billion years

What unit does hubbles constant have

• s

• s^-1

• s²

• s¹

Hubbles law states that the distance to a galaxy is _________ to it's recessional velocity.

• Directly proportional

• inversely proportional

On hubbles law graph (recessional velocity v distance to galaxy) what is the gradient equal to?