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Module 8: From the Universe to the Atom
Quick questions on Origins of the elements and the Big Bang: HSC Physics Module 8
5short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is the cosmic microwave background?Show answer
Penzias and Wilson (1964) discovered an isotropic microwave hiss in their antenna that could not be attributed to instrument noise or known sources. The spectrum measured precisely by the COBE satellite (1989) is the most perfect blackbody known in nature, with K.
What is timeline of the early universe?Show answer
The Big Bang model does not describe "what came before"; it describes the evolution of the universe from a hot dense state of which we have direct evidence (the CMB and primordial element abundances).
What is q1?Show answer
State Hubble's law and define each symbol. [2 marks]
What is q2?Show answer
A galaxy is observed at a distance of . Calculate its recession velocity using . [2 marks]
What is q3?Show answer
The cosmic microwave background is one piece of evidence for the Big Bang. (a) Calculate the peak wavelength of a blackbody at . (b) State two other pieces of evidence supporting the Big Bang.
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