The photoelectric equation for the kinetic energy of a photoelectron is, following Einstein, E <hf – W, whereh is Planck's constant, f is the frequency of the light, and W is the work-function.Sodium has W = 3.2×10-19 J. When sodium is illuminated by monochromatic light of a particularfrequency, electrons are emitted with speeds up to 8 x 105 ms-1.a) Calculate the wavelength of the light.b) Calculate the stopping potential.

Given that Work function of the sodium is W=3.2×10-19 J Speed of the emitted electron or…

The photoelectric equation for the kinetic energy of a photoelectron is, following Einstein, E < hf – W, where h is Planck's constant, f is the frequency of the light, and W is the work-function. Sodium has W 3.2x 10-19 J. When sodium is illuminated by monochromatic light of a particular frequency, electrons are emitted with speeds up to 8 x 105 m s-1. a) Calculate the wavelength of the light. b) Calculate the stopping potential.

The photoelectric equation for the kinetic energy of a photoelectron is, following Einstein, E < hf – W, where h is Planck's constant, f is the frequency of the light, and W is the work-function. Sodium has W 3.2x 10-19 J. When sodium is illuminated by monochromatic light of a particular frequency, electrons are emitted with speeds up to 8 x 105 m s-1. a) Calculate the wavelength of the light. b) Calculate the stopping potential.