Here we learn about X-Rays :
About x-ray
X-Rays are Electromagnetic radiations having wavelength from a fraction of an angstrom .
They were discovered by Roentgen during his studies on the electrical discharge phenomena in gasses he found that an unknown radiation was produced < when electrons collided awirh the wallls of the tubes .
Properties of X-Rays
- They ionize the material through which they passes
- They affect photographic plates in the same manner as visible light
- They cause fluorescence in certain chemical compounds like zinc sulphide
- They penetrate matter and are absorbed as they pass through it .
Memorable Points
For the production of X-Rays , it is essential to keep high order vacuum in the tube so that the electrons emittedd by the filament do nnot collide with the gas atoms before they reach they reach the target .
Because if the electrons strike the atoms of the f]gas they will lose their energy by ionizing the gas and The positive ions so produced will be attracted towards the filament .
- When some information is require about patient's stomach by x-rays then the patient is administered some heavy - atom substance (like barium sulphate solution
- Heavy atoms diffract x-rays sufficiently so those parts of the stomach where this solution goes are photographed on the plate this enables direction of some stone etc in those parts the parts where this solution does not reach are not clearly photographed this shows that thet is some obstruction in the path of the solution
- X-Rays are Electromagnetic tradiations having wavelength from a fraction of an angstrom to about 100 A .
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