4. (a) Which row of the table is correct for both infrasound radiation and infrared radiation?
Put a cross (X) in the box next to your answer - Edexcel - GCSE Physics - Question 4 - 2011 - Paper 1
Question 4
4. (a) Which row of the table is correct for both infrasound radiation and infrared radiation?
Put a cross (X) in the box next to your answer.
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Worked Solution & Example Answer:4. (a) Which row of the table is correct for both infrasound radiation and infrared radiation?
Put a cross (X) in the box next to your answer - Edexcel - GCSE Physics - Question 4 - 2011 - Paper 1
Step 1
Which row of the table is correct for both infrasound radiation and infrared radiation?
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Answer
Infrasound is always longitudinal, whereas infrared radiation is generally transverse. Therefore, the correct row is D: infrasound (longitudinal) and infrared (longitudinal).
Step 2
State the amplitude of this sound wave.
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Answer
The amplitude of the sound wave is 5 cm.
Step 3
Describe how infrasound differs from ultrasound.
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Answer
Infrasound refers to sound waves with frequencies below the range of human hearing, typically below 20 Hz, while ultrasound refers to sound waves with frequencies above 20 kHz. They differ in their frequency ranges and applications; infrasound is often used in monitoring natural events like earthquakes, while ultrasound is used in medical imaging.
