Cosmic Background Radiation
Physics ⇒ Earth and Space Physics
Cosmic Background Radiation starts at 11 and continues till grade 12.
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Calculate the energy of a CMB photon with a wavelength of 1.9 mm. (Planck's constant h = 6.63 × 10-34 J·s, c = 3.0 × 108 m/s)
Calculate the frequency corresponding to the peak wavelength of the CMB (1.9 mm). (Speed of light c = 3.0 × 108 m/s)
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.
The cosmic microwave background radiation was first discovered in 1965 by which two scientists?
What does the isotropy of the CMB tell us about the early universe?
What is cosmic microwave background (CMB) radiation?
What is the peak wavelength of the CMB radiation?
