1.

The de Broglie wavelength of an electron accelerated by a voltage of 50V is closed to abs e = 1.6 xx 10^(-19)c,m_e = 9.1 xx 10^(31)kg, h = 6.6 xx 10^(-34) Js

Answer»

`1.2^@`
`2.4 A^@`
`0.5 A^@`
`1.7 A^@`

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