Mecánica con aplicaciones, otoño 2023

 

Estimadas y estimados estudiantes...

deseando estén gozando de una estupenda tarde, les comparto el siguiente ejercicio (que sería la segunda parte de lo acordado), para entregar el próximo lunes, a la hora de clase:

Saludos cordiales

Fundamentals of modern physics, fall course 2023

 

Hello dear students...

print the document and present it in class next Tuesday, resolved please!!!.

Thank you.

Have a great weekend.

Please be clear and well-organized in all your steps.

1. Gold has a work function of 4.83 eV.

(a) What is the value of the threshold frequency? I.e., what is the lowest frequency for electromagnetic radiation incident on a gold surface if photoelectrons are to be emitted in the photoelectric effect? Answer ___________

(b) Now suppose that ultraviolet light with a wavelength of 150 nm shines on a gold surface. What is the stopping potential? I.e., what is the potential of the collector relative to the emitter which will barely prevent electrons from making it to the collector and producing a current? Answer ___________

2. Our Sun has a surface temperature of about 6000 K. A particular blue giant has a surface temperature of 30,000 K. And a particular red dwarf has a surface temperature of 3000 K.

(a) For each of these stars, determine λmax , the wavelength at the peak in the plot of intensity versus wavelength. Sun ______________ blue giant _____________ red dwarf _____________