Physical Chemistry 2 - Work function - HELP NEEDED

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Homework Help Overview

The discussion revolves around a problem related to the photoelectric effect, specifically involving the work function of rubidium (Rb) and the interaction of a laser pulse with this material. The original poster seeks assistance in determining the number of electrons ejected, their energy, and their velocity when exposed to a 500nm laser light pulse.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • Participants discuss relevant equations related to kinetic energy, wavelength, and energy quantization. The original poster lists equations they believe are pertinent to the problem, while others inquire about their attempts and understanding of the concepts involved.

Discussion Status

There is an ongoing exploration of the problem with participants providing guidance on the equations that may be useful. Some participants encourage the original poster to apply the equations they have identified, while also inviting them to share any difficulties encountered in their calculations.

Contextual Notes

The original poster's inquiry is framed within the constraints of a homework assignment, which may limit the extent of guidance provided by other participants. The discussion reflects a focus on understanding the application of the photoelectric effect in this context.

gunner05
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I really need help with the following question,

If the work function of Rb is 2.09 eV, what is the number of electrons ejected, their energy in eV, and their velocity, from a microjoule pulse of 500nm laser light?
 
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This is a standard application of the photoelectric effect - what have you tried so far? What equations do you have that may be useful?
 
I have K.E = hv-(work function)
and v=speed of light/wavelength
E = nhv
 
t!m said:
This is a standard application of the photoelectric effect - what have you tried so far? What equations do you have that may be useful?

I have K.E = hv-(work function)
and v=speed of light/wavelength
E = nhv
 
You have pretty much everything you need then, just plug away. If you get stuck, show us where.
 

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