Discussion :: Physics
- Which of the following is not true about X-rays?
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A.
Have low penetrating power |
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B.
Travel with the speed of light |
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C.
Can be reflected or refracted |
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D.
Can affect photographic plates |
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Answer : Option A
Explanation :
X-rays and gamma rays are photons, i.e. high energy light-waves. When emitted by a source, for example, radium or cobalt, located outside the body, they easily pass through the body, hence they are usually called penetrating radiation. Because X-rays are penetrating, they can be used in diagnostic medicine to image human bones or human organs made opaque by a dye.
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