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Types of X-rays: Soft and Hard X-rays

X-rays are of two types : (i) Soft X-rays and (ii) Hard X-rays A German scientist, Wilhelm Roentgen, in 1895, discovered X-rays when he was studying the phenomenon of discharge of electricity through gases.

Soft X-rays and Hard X-rays

 

X-rays are of two types : (i) Soft X-rays and (ii) Hard X-rays

 

(i) Soft X-rays

 

X-rays having wavelength of 4 or above, have lesser frequency and hence lesser energy. They are called soft X - rays due to their low penetrating power. They are produced at comparatively low potential difference.

 

(ii) Hard X-rays

 

X-rays having low wavelength of the order of 1 have high frequency and hence high energy. Their penetrating power is high, therefore they are called hard X-rays. They are produced at comparatively high potential difference.

 

The wavelength of X-rays depends upon the kinetic energy of the electrons producing them and this kinetic energy depends upon the potential difference between the filament and the target.


X-rays

 

A German scientist, Wilhelm Roentgen, in 1895, discovered X-rays when he was studying the phenomenon of discharge of electricity through gases.

 

After performing a series of experiments, Roentgen concluded that when a beam of fast moving electrons strike a solid target, an invisible penetrating radiation is produced. Due to the unknown nature of the radiation, Roentgen called these radiations as X - rays.

 

X-rays are electromagnetic waves of short wavelength in the range of 0.5 to 10 . Roentgen was awarded Nobel prize in 1901 for the discovery of X-rays.


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