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?
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The oximeter is usually placed on the finger to take measurements (Option A). This placement is optimal for providing accurate readings of both heart rate and blood oxygen levels due to the thin skin and good blood flow in the fingertips.
Step 2
State what type of radiation the other LED emits.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The other LED emits infrared radiation. This light is not visible to the human eye but is essential for measuring the absorption of oxygenated and deoxygenated blood, which helps in determining the oxygen saturation levels.
