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Two elements A and B with atomic numbers...

Two elements A and B with atomic numbers `Z_(A)` and `Z_(B)` are used to produce charateristic X-rays with frequencies `v_(A)` and `v_(B)` respectively. If `Z_(A):Z_(B)=1:2,` then `v_(A):v_(B)` will be

A

`1:sqrt(2)`

B

`1:8`

C

`4:1`

D

`1:4`

Text Solution

Verified by Experts

The correct Answer is:
D
According to Moseley.s law,
`sqrt(upsilon) propto Z`
`therefore upsilon_(A)/upsilon_(B)=(Z_(A)/Z_(B))^(2)=(1/2)^(2)=1/4`
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