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Q. The difference between soft and hard X-rays is of

BVP MedicalBVP Medical 2011

Solution:

The penetrating power of X-rays depends upon their wavelength. The frequency of the longer wavelength (approximately $ mg{{R}_{e}}\,. $ ). X-rays is lower and so their energy is smaller. Hence, their penetrating power is weaker and they are called soft or less penetrating X-rays. The penetrating power of the shorter wavelength (approximately $ {{R}_{e}} $ ). X-rays is stronger and they are called hard or highly penetrating X-rays. Hence, the difference between the two is only of frequency.