1.

Figure shows the variation of frequency of a characteristic X -ray and atomic number.

Answer»

The characteristic `X`-ray is `K_(alpha)`
The characteristic `X`- ray is `K_(beta)`
The energy of photon emitted when this `X`-ray is emitted by a metal having `z=101` is `204keV`
The energy of photon emitted when this `X`-ray is emitted by a metal having `z=101` is `102 KEV`

SOLUTION :i. From MOSELEY's law `sqrt(v)=a(z-b)`
`v=0` at `z=b`. From graph `v=0` at `z=1`
`:.b=1 :.K_(alpha)`
ii. For `K_(alpha), sqrt(v)=sqrt((3RC)/4)(z-1)`
Photon energy `=hv=3/4 HRC. 100^(3)=3/4xx13.6xx100^(2)=102keV`


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