Physics for IGCSE & O level - Waves And Sounds (Section 3 - No. 1)
Why can X-rays not be used for the ultrasound test?
Because it can cause cell damage to the fetus
Because it has a higher frequency.
Because it is an infrared wave.
X-rays cannot be directed at a fetus.
Giải thích
X-rays cannot be used because it can cause cell damage inside a growing baby.