Which statement is not correct for ultrasound and X-rays?
A Both can be refracted
B Both can be diffracted
C Both can be polarised
D Both can be reflected - AQA - A-Level Physics - Question 14 - 2017 - Paper 1
Question 14
Which statement is not correct for ultrasound and X-rays?
A Both can be refracted
B Both can be diffracted
C Both can be polarised
D Both can be reflected
Worked Solution & Example Answer:Which statement is not correct for ultrasound and X-rays?
A Both can be refracted
B Both can be diffracted
C Both can be polarised
D Both can be reflected - AQA - A-Level Physics - Question 14 - 2017 - Paper 1
Step 1
Both can be refracted
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Answer
This statement is correct. Both ultrasound and X-rays can undergo refraction when passing through different media due to changes in speed.
Step 2
Both can be diffracted
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Answer
This statement is also correct. Both types of waves can show diffraction, bending around obstacles and spreading out after passing through narrow openings.
Step 3
Both can be polarised
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Answer
This statement is important to address because while ultrasound is a mechanical wave that cannot be polarised, X-rays are electromagnetic waves and can indeed be polarised. Thus, this is the incorrect statement.
Step 4
Both can be reflected
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Answer
This statement is correct. Both ultrasound and X-rays can be reflected when they encounter boundaries between different materials.
