An electron in an electron microscope wi...

An electron in an electron microscope with initial velocity `v_(0)hati` enters a region of a stray transverse electric field` E_(0)hatj` . The time taken for the change in its de-Broglie wavelength from the initial value of `lambda` to `lambda//3` is proportional to

`E_(0)`

`1/(E_0)`

`1/(sqrtE_0)`

`sqrt(E_(0))`

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