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Ultrasound has many different applications - Edexcel - GCSE Physics - Question 5 - 2012 - Paper 1
Question 5
Ultrasound has many different applications. (a) Complete the sentence by putting a cross (✓) in the box next to your answer. Ultrasound is used for A cooking B co... show full transcript
Worked Solution & Example Answer:Ultrasound has many different applications - Edexcel - GCSE Physics - Question 5 - 2012 - Paper 1
Step 1
Step 2
Explain why ultrasound rather than X-rays are used for foetal scanning.
Answer
Ultrasound is preferred over X-rays for foetal scanning because X-rays are ionising and can pose hazards, such as damaging tissues or DNA, which may lead to cancer. In contrast, ultrasound is non-ionising and does not have associated risks, making it safer for both the foetus and the mother.
Step 3
Step 4
Describe the motion of particles in a material when this ultrasound wave passes through.
Answer
When the ultrasound wave passes through the material, the particles vibrate or oscillate. They move back and forth in the same direction as the wave travels, creating compressions and rarefactions within the material.