Which term refers to the phenomenon of light shining on a metal and causing electrons to...
A scientist is trying to eject electrons from a metal by shining a light on it. The electrons are bound inside the metal need energy of 2.0 eV to escape. Which wavelength will eject electrons? a. 350 nm b. 420 nm c. any of these d. 600 nm e. none of these
a) A scientist is trying to eject electrons from a metal by shining a light on it. The electrons are bound inside the metal need energy of 2.0 eV to escape. Which wavelength will eject electrons? a. 350 nm b. 420 nm C. any of these d. 600 nm e. none of these
In the photoelectric effect experiment, a beam of light is shining on a metal surface and the electrons are emitted from the metal. One of the three key findings is that a minimum frequency of light is required for emission of electrons. This minimum frequency is found to be 5.5 × 1014 s-1 for an unknown metal. 4 Briefly describe the other two findings and draw a plot fo the KE of emitted electrons against light frequency. (a) (6 marks)...
A uniform ultraviolet light source shines on two metal plates causing electrons to be emitted from each plate. Plate A emits twice as many electrons as plate B. However, the electrons emitted from plate B have a higher maximum velocity. Which of the following describes a plausible explanation for the differences in electron emission? (Select two answers.) A) Plate A must have a larger work function than plate B. B) The higher velocity electrons in case B would be produced...
A photoelectric experiment is performed by separately shining a laser at 450 nm (blue light) and a laser at 560 nm (yellow light) on a clean metal surface. Assume that each laser is above the threshold frequency and delivers the same number of photons per second. Which laser will eject electrons with shorter de Broglie wavelength?
Electrons are emitted from the surface of a metal when it's exposed to light. This is called the photoelectric effect. Each metal has a certain threshold frequency of light, below which nothing happens. Right at this threshold frequency, an electron is emitted. Above this frequency, the electron is emitted and the extra energy is transferred to the electron. The equation for this phenomenon is KE=hν−hν0KE=hν−hν0 where KEKEKE is the kinetic energy of the emitted electron, h=6.63×10−34J⋅sh=6.63×10−34J⋅s is Planck's constant, ννnu...
When red light shines on a piece of metal, no electrons are released. When the red light is slowly changed to shorter-wavelength light (basically progressing through the rainbow), nothing happens until yellow light shines on the metal, at which point electrons are released from the metal. If this metal is replaced with a metal having a higher work function, which light would have the best chance of releasing electrons from the metal? If this metal is replaced with a metal...
Light striking a metal surface causes electrons to be emitted from the metal via the photoelectric effect.In a particular experiment to study the photoelectric effect, the frequency of the incident light and the temperature of the metal are held constant. Assuming that the light incident on the metal surface causes electrons to be ejected from the metal, what happens if the intensity of the incident light is increased?Check all that apply.The work function of the metal decreases.The number of electrons...
A tin surface emits electrons after shining with a light of frequency of 2.61×1015 s-1. Calculate the maximum kinetic energy of the ejected electron if the work function of tin is 4.09 eV.
A manganese surface emits electrons after shining with a light of frequency of 6.45×1015 s-1. Calculate the maximum kinetic energy of the ejected electron if the work function of manganese is 4.47 eV.