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X-rays
X-rays are high-frequency electromagnetic waves with wavelengths shorter than ultraviolet radiation and generally longer than gamma rays.
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X-rays
Recommended for Class 10
X-rays
X-rays are high-frequency electromagnetic waves with wavelengths shorter than ultraviolet radiation and generally longer than gamma rays.
X-rays have enough photon energy to be classed as ionising radiation.
Production
In an X-ray tube, fast electrons are accelerated and then rapidly decelerated when they strike a metal target.
This can produce X-rays.
Medical Imaging
X-rays pass through soft tissues more easily than through dense bone.
As a result, bones absorb more X-rays and appear with strong contrast in X-ray images.
Other Uses
security scanning; industrial inspection; * material analysis.
Hazards
Because X-rays are ionising, excessive exposure can damage cells and DNA.
Medical use therefore involves controlled doses and shielding.
X-rays — Advanced
Common Mistakes
Common Mistakes
- Mistake
X-rays are electromagnetic waves, not particles of matter.
- Mistake
X-rays are not completely absorbed by bone; absorption is simply greater than in many soft tissues.
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Practice
PQ
Q1. Define X-rays.
PQ
Q2. Explain X-ray production.
PQ
Q3. Explain medical imaging.
PQ
Q4. Give two other uses.
PQ
Q5. State hazards.
Exam Practice
EQ
Q1. Define X-rays.
EQ
Q2. Explain X-ray production.
EQ
Q3. Explain medical imaging.
EQ
Q4. Give two other uses.
EQ
Q5. State hazards.
School-standard facts for Matric and Intermediate. Original explanations — not copied from textbooks.