Монохроматический свет с длиной волны 0,165 мкм падает на медный шарик. Работа выхода электрона для меди равна 7,2 ⋅10^−19 Дж какова будет энергия фотонов в дж? и до какого потенциала зарядится шарик в ватт?
The energy, or энергия фотонов, of photons is given by the formula E = hc/λ, where h is Planck's constant and λ is the wavelength of light. Assuming a monochromatic light with a wavelength of 0.165 microns, we can calculate the energy to be approximately 7.56 × 10-19 Joules.
Now, let's look at the potential of the charged copper ball, or потенциал зарядения шарика. When light shines on a metal surface, it can cause electrons to be emitted, a phenomenon known as the photoelectric effect. The work function, or работа выхода электрона, for copper is given as 7.2 × 10-19 Joules. This means that each photon must have at least this energy in order to be able to knock an electron out of the metal surface. Any excess energy will be converted into kinetic energy of the electron.
As for the charging of the ball, it will depend on the number and energy of the photons hitting the surface. If we assume that the copper ball is initially neutral, each photon with enough energy can knock out an electron and leave a positive charge behind. This will continue until the electrons on the surface have accumulated enough energy to repel any more incoming photons. At this point, the ball will reach a steady state with a certain amount of charge.
So, to summarize:
- The energy of the photons is approximately 7.56 × 10-19 Joules.
- The potential of the charged copper ball will depend on the number and energy of incoming photons, but it will reach a steady state eventually.
