Cosmic Background Radiation
Physics ⇒ Earth and Space Physics
Cosmic Background Radiation starts at 11 and continues till grade 12.
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Context: The CMB is observed to be redshifted compared to its original emission. What does this redshift indicate about the universe's history?
Describe how the CMB supports the theory of the expanding universe.
Describe the role of the CMB in determining the composition of the universe.
Describe the significance of the tiny fluctuations observed in the CMB.
Explain the term 'recombination' in the context of the CMB.
Explain why the CMB is not perfectly uniform and what causes the small anisotropies.
Explain why the CMB is observed in the microwave region of the electromagnetic spectrum today.
Context: The CMB is observed to be redshifted compared to its original emission. What does this redshift indicate about the universe's history?
The CMB has a blackbody spectrum corresponding to which temperature? (1) 0.3 K (2) 2.7 K (3) 10 K (4) 300 K
The CMB is a remnant from which era of the universe? (1) Inflationary era (2) Recombination era (3) Nucleosynthesis era (4) Galaxy formation era
The CMB is best described as which type of spectrum? (1) Continuous spectrum (2) Emission line spectrum (3) Absorption line spectrum (4) Discrete spectrum
Which of the following best describes the polarization of the CMB? (1) It is unpolarized (2) It is partially polarized due to Thomson scattering (3) It is fully polarized (4) It is circularly polarized
Fill in the blank: The CMB provides a snapshot of the universe when it became ______ to radiation.
Fill in the blank: The CMB was emitted approximately ______ years after the Big Bang.
Fill in the blank: The CMB was first detected as excess ______ noise in a radio antenna.
The temperature of the cosmic microwave background radiation is approximately ______ K.
True or False: The CMB can be observed from the surface of the Earth without any interference.
True or False: The CMB can be used to determine the age of the universe.
True or False: The CMB is completely uniform with no variations.
True or False: The CMB is evidence supporting the Big Bang theory.
