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3. The Universe (a) Which row of the table shows these objects in the correct order of size? Put a cross (X) in the box next to your answer - Edexcel - GCSE Physics - Question 3 - 2013 - Paper 1
Question 3
3. The Universe (a) Which row of the table shows these objects in the correct order of size? Put a cross (X) in the box next to your answer. | ... show full transcript
Worked Solution & Example Answer:3. The Universe (a) Which row of the table shows these objects in the correct order of size? Put a cross (X) in the box next to your answer - Edexcel - GCSE Physics - Question 3 - 2013 - Paper 1
Step 1
Step 2
Explain why the images produced by telescopes on Earth are less clear than the images produced by telescopes in space.
Answer
The images produced by telescopes on Earth are less clear due to atmospheric interference. The Earth's atmosphere can distort light from celestial objects due to turbulence, dust, and moisture, which results in reduced clarity. In contrast, telescopes in space are free from these atmospheric effects, allowing for clearer and more stable images.
Step 3
Explain what these redshifts predict about the position and movement of the two galaxies.
Answer
The redshifts observed from galaxies 1 and 2 indicate that both galaxies are moving away from us. This movement suggests that the universe is expanding. The greater the redshift, the faster a galaxy is receding, which can be used to estimate its distance from us.
Step 4
Describe how this process continues for stars much more massive than the Sun.
Answer
For stars much more massive than the Sun, the process begins similarly with the formation of a protostar amidst a nebula. As the protostar gathers mass, it eventually enters the main sequence phase where it fuses hydrogen into helium. Once the hydrogen is depleted, the star expands into a supergiant. After this phase, it undergoes a supernova explosion. Depending on the remaining mass, the remnants may form a neutron star or, if massive enough, collapse into a black hole. It is important to note that more massive stars have shorter lifespans due to the rapid consumption of fuel.