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4. Using lenses (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. Using lenses (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... show full transcript
Worked Solution & Example Answer:4. Using lenses (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.
Answer
- Cameras allow for permanent records of celestial observations, enabling scientists to analyze data over time.
- They can capture faint objects that are not visible to the unaided eye due to their enhanced sensitivity and ability to gather more light.
Step 2
Explain how these observations helped to change scientists' ideas about the Universe.
Answer
Galileo's observation of the moons orbiting Jupiter provided crucial evidence against the geocentric model, which posited that everything orbited around the Earth. Instead, his findings suggested a heliocentric model where celestial bodies, including the moons, orbited around Jupiter, indicating that Earth was not the center of the Universe. This challenged and ultimately changed the prevailing beliefs about the structure of our solar system.
Step 3
Complete the sentence by putting a cross (✖) in the box next to your answer.
Answer
Given the diagram, the light from a distant object converges at the focal point of the lens. As the lens is positioned at the 20 cm mark and the light rays focus there, the focal length of the lens is 20 cm. Therefore, you would place a cross (✖) next to option B.