4. (a) State two advantages of using a camera, rather than the unaided eye, for studying stars - Edexcel - GCSE Physics - Question 4 - 2015 - Paper 1
Question 4
4. (a) State two advantages of using a camera, rather than the unaided eye, for studying stars.
(b) Galileo observed the moons of Jupiter.
Explain how these observ... show full transcript
Worked Solution & Example Answer:4. (a) State two advantages of using a camera, rather than the unaided eye, for studying stars - Edexcel - GCSE Physics - Question 4 - 2015 - Paper 1
Step 1
State two advantages of using a camera, rather than the unaided eye, for studying stars.
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Answer
Measurements can be taken, allowing for more accurate data collection.
A camera provides a permanent record of observations, enabling further analysis and comparison.
Step 2
Explain how Galileo’s observations of the moons of Jupiter helped to change scientists’ ideas about the Universe.
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Answer
Galileo's observations provided evidence against the geocentric model, which held that everything orbits around the Earth. He noted that moons orbit Jupiter, demonstrating that not all celestial bodies revolve around the Earth. This led scientists to consider the heliocentric model, which proposed that everything orbits around the Sun.
Step 3
The focal length of the lens is
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Answer
Cross (X) should be placed next to option B (20 cm) as the focal length of the lens is indicated to be at the 20 cm mark on the metre rule.
