During the twentieth century red-shift and CMB radiation were discovered - Edexcel - GCSE Physics - Question 1 - 2013 - Paper 1
Question 1
During the twentieth century red-shift and CMB radiation were discovered.
They have provided scientists with data to test theories of the origin of the Universe.
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Worked Solution & Example Answer:During the twentieth century red-shift and CMB radiation were discovered - Edexcel - GCSE Physics - Question 1 - 2013 - Paper 1
Step 1
CMB is an abbreviation for
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Answer
CMB stands for cosmic microwave background radiation. This term is essential as it relates to the thermal radiation filling the universe, significant in cosmology.
Step 2
State which theory about the origin of the Universe is supported by the existence of CMB.
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Answer
The existence of CMB supports the Big Bang theory, which posits that the universe originated from a hot, dense state and has been expanding ever since.
Step 3
State what is meant by red-shift.
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Red-shift refers to the change in the observed frequency or wavelength of light from a distant galaxy, where light appears to be stretched to a longer wavelength, indicating that the galaxy is moving away from us. This effect is a critical piece of evidence supporting the expanding universe model.
Step 4
Which of these gives the next stages in the evolution of the Sun?
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Answer
The correct option is D: red giant then white dwarf.
Step 5
Explain what additional data can be collected and processed using modern telescopes.
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Modern telescopes are capable of detecting different wavelengths of electromagnetic radiation, such as infrared and ultraviolet, which can provide more detailed information about celestial objects. Additionally, advancements in technology allow for higher resolution images and the capability to analyze light signals more effectively, enhancing our understanding of the universe.
