When light strikes a glass surface it can be both refracted and reflected - Edexcel - GCSE Physics - Question 3 - 2013 - Paper 1
Question 3
When light strikes a glass surface it can be both refracted and reflected.
(a) The diagram shows the possible paths for a ray of light which strikes a surface at th... show full transcript
Worked Solution & Example Answer:When light strikes a glass surface it can be both refracted and reflected - Edexcel - GCSE Physics - Question 3 - 2013 - Paper 1
Step 1
Which of the lines show the possible path of a ray of light passing from air into glass?
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Answer
The correct answer is line B (POR). This line indicates the correct refraction of light as it moves from air, which is less dense, into glass, which is denser.
Step 2
Which row of the table is correct for what happens when the wave is refracted?
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Answer
The correct answer is row D. The speed of the wave changes as it moves from deep water to shallow water, and the direction of the wave also changes due to refraction.
Step 3
Explain how a refracting telescope produces a magnified image of Jupiter.
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Answer
A refracting telescope uses lenses to bend and focus light from a distant object, like Jupiter. The objective lens gathers light and forms an image that is then magnified by the eyepiece lens. This combination allows observers to see distant celestial objects in greater detail.
Step 4
Explain how Galileo's observations contradicted the geocentric model.
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Answer
Galileo's observations, particularly of Jupiter's moons, provided evidence that not all celestial bodies revolved around the Earth. This challenged the geocentric model, which stated that the Earth was the center of the universe. His findings supported the heliocentric view that the planets, including Earth, orbit the Sun.
Step 5
Using this information, calculate the approximate distance of Jupiter from the Earth.
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Answer
To find the distance of Jupiter from Earth, we use the ratio of time taken for light to travel. Given that it takes about 2100 s for light to travel from Jupiter and 500 s from the Sun to Earth, we can set up the following ratio:
rac{2100}{500} = rac{Distance ext{ } to ext{ } Jupiter}{150 ext{ } million ext{ } km}
