The photograph shows a pulse oximeter - Edexcel - GCSE Physics - Question 5 - 2013 - Paper 1
Question 5
The photograph shows a pulse oximeter. This is used to show the heart rate and the amount of oxygen in the blood.
(a) (i) Where is the oximeter usually placed to ta... show full transcript
Worked Solution & Example Answer:The photograph shows a pulse oximeter - Edexcel - GCSE Physics - Question 5 - 2013 - Paper 1
Step 1
Where is the oximeter usually placed to take measurements?
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Answer
The oximeter is usually placed on the finger. Therefore, the correct answer is A: On the finger.
Step 2
State what type of radiation the other LED emits.
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Answer
The other LED emits infrared radiation. This type of radiation is used along with visible light to measure the difference in absorption by the blood.
