1. 2 materials X-rays are absorbed by
- bone and metal
- tissue and blood
- plastic and metal
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Other questions in this quiz
2. What type of lens is use for magnifying glasses?
3. What type of lens is used for long sighted people?
4. What is the focal length?
- The distance from the eye to the lens
- the distance from the centre of the lens to the principal focus
- The distance from each of the principal focuses
5. What type of lens is used for short sighted people?