Evidence for Big Ban

Question 1

CMB?

Answer 1

Cosmic Background Radiation

Question 2

If big bang occurred, what did scientists calculate that the entire universe should be awash with?

Answer 2

Universe should be awash with microwave radiation of a particular frequency. Like the ‘afterglow’ of the early, hot explosion

Question 3

HAs the CMB radiation been discovered, confirmed and found to be exactly as predicted?

Answer 3

Yes, the tv static

Question 4

Universe is expanding:

Answer 4

• Distant galaxies moving away from us.
• More distant, faster moving away
• Consistent with idea of an outward expansion of the Universe.
• Rate of expansion points back a time when the universe was in one point.

Question 5

How do they measure movement of distant galaxies?

Answer 5

by their radiation, showing a ‘red-shift’ of wavelength and frequency

Question 6

The Doppler Effect:

Answer 6

Effects all types of waves.

Question 7

Stationary object in doppler effect:

Answer 7

waves same in all direction

Question 8

MOving object in doppler effect;

Answer 8

waves in front get ‘bunched up’ and their wavelength is shortened. The waves behind get “stretched” and the wavelength is lengthened.

Question 9

Visible light waves: red and blue?

Answer 9

longer waves are red

short waves are blue

Question 10

What is the doppler effect use?

Answer 10

powerful evidence for expansion of universe