Consider the step potential function shown below. Assume that a flux of electrons has energy E and it is incident on a potential barrier of height Vo with E > V0. The electrons are traveling in the x direction and they are originated from x =--. i. Find the transmission coefficient between regions l and II i. Find the reflection coefficient between regionsland II. ii. Assume the electron velocity is 7 x105 cm/s, E = V0 /0.1. Find the probability that there is an electron at the distance a = 70 A' after the barrier. iv. Determine the de Broglie wavelength in A? V(x) Incident particles Vo Region I Region II x = 0

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Electric field

A physical field present around an electrically charged particle that exerts a force on all other charged particles is called an electric field. The charged particles present in the field either repel or attract. From electric charges or time-varying magnetic fields, the electric field originates. One of the manifestations of electromagnetic force which is one of the four fundamental forces present in nature are the electric fields and magnetic fields.