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Consider an electron with initial velocity 1 m/s in the x direction. We turn on an electric field of -1 V/m in the x direction. 1) What is the momentum of the electron? kg m/s Submit 2) Now, let's consider the case where this electron is in free space and treat it completely classically. Remember that F=. What is its velocity after 105 s? 1758240 m/s Submit 1758240 Your submissions: Computed value: 1758240 Submitted: Friday, February 25 at 5:56 PM Feedback: 3) Now consider the electron in a material with a gap of 5 eV. Because of the gap, in order to increase the electron's momentum, the electric field must increase the electron's energy by 5 eV, which is impossible without applying ultraviolet light. In this case, what is the electron's velocity after 10 s in the electric field? m/s

Consider an electron with initial velocity 1 m/s in the x direction. We turn on an electric field of -1 V/m in the x direction. 1) What is the momentum of the electron? kg m/s Submit 2) Now, let's consider the case where this electron is in free space and treat it completely classically. Remember that F=. What is its velocity after 105 s? 1758240 m/s Submit 1758240 Your submissions: Computed value: 1758240 Submitted: Friday, February 25 at 5:56 PM Feedback: 3) Now consider the electron in a material with a gap of 5 eV. Because of the gap, in order to increase the electron's momentum, the electric field must increase the electron's energy by 5 eV, which is impossible without applying ultraviolet light. In this case, what is the electron's velocity after 10 s in the electric field? m/s

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Consider an electron with initial velocity 1 m/s in the x direction. We turn on an electric field of -1 V/m in the x direction. 1) What is the momentum of the electron? kg m/s Submit 2) Now, let's consider the case where this electron is in free space and treat it completely classically. Remember that F= . What is its velocity after 105 s? 1758240 m/s Submit 1758240 Your submissions: Computed value: 1758240 Submitted: Friday, February 25 at 5:56 PM Feedback: 3) Now consider the electron in a material with a gap of 5 ev. Because of the gap, in order to increase the electron's momentum, the electric field must increase the electron's energy by 5 eV, which is impossible without applying ultraviolet light. In this case, what is the electron's velocity after 10 s in the electric field? m/s
Transcribed Image Text:Consider an electron with initial velocity 1 m/s in the x direction. We turn on an electric field of -1 V/m in the x direction. 1) What is the momentum of the electron? kg m/s Submit 2) Now, let's consider the case where this electron is in free space and treat it completely classically. Remember that F= . What is its velocity after 105 s? 1758240 m/s Submit 1758240 Your submissions: Computed value: 1758240 Submitted: Friday, February 25 at 5:56 PM Feedback: 3) Now consider the electron in a material with a gap of 5 ev. Because of the gap, in order to increase the electron's momentum, the electric field must increase the electron's energy by 5 eV, which is impossible without applying ultraviolet light. In this case, what is the electron's velocity after 10 s in the electric field? m/s
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