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 B POR. The ray of light passes from the air into the glass, moving towards the normal as it enters a denser medium.
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 C changes changes. As the wave enters shallower water, its speed decreases and the direction changes, causing the wave to bend.
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 light rays from distant objects. The objective lens gathers light and brings it to a focus, forming a real image. The eyepiece lens then magnifies this image for the observer. The combination of these lenses allows for a larger, clearer view of celestial bodies like Jupiter.
Step 4
Explain how Galileo’s observations contradicted the geocentric model.
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Answer
Galileo's observations included the moons of Jupiter and the phases of Venus, which could not be explained by the geocentric model. His findings showed that not all celestial bodies orbit the Earth, contradicting the belief that the Earth was the center of the universe and supporting the heliocentric model.
Step 5
Calculate the approximate distance of Jupiter from the Earth.
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Answer
To calculate the distance of Jupiter, we use the ratio of travel times. Since light takes 2100 s to reach Earth from Jupiter and 500 s to reach from the Sun to Earth, we set up the equation:
500 s2100 s=150 million kmdJupiter
Solving for dJupiter gives:
dJupiter=5002100×150=630 million km
Thus, the approximate distance of Jupiter from the Earth is 630 million km.
