When an electron acceleration by potential different `U` is bombarded on a specific metal, the emitted X-ray spectrum obtained is shown in figure . If the potential different is reduced to `U//3` , the correct spectrum is

Options

A.
B.
C.
D.

Answer

B

Explanation

`lambda_(m)` will increase to `3 lambda_(m)` due to derease in the energy of bombarding electrons. Hence , no characteristic X- ray willl be visible , only continuous X- ray willl be produced.