A metal surface has a work function of 7.00eV . If light with a frequency of 1.00x1015Hz strikes the surface, will any electron be emitted and if so, what will their kinetic energy be?
A metal surface has a work function of 7.00eV . If light with a frequency of...
Light with a frequency of 4.43 × 1015 Hz strikes a metal surface and ejects electrons that have a maximum kinetic energy of 6.5 eV. What is the work function of the metal?
Metal A has a higher work function than metal B. The lowest frequency of light that will cause electrons to be emitted from metal B is fB Which of the following is true: Select one: a. light of any frequency will cause photoelectrons to be emitted from metal A, but only above a threshold intensity determined by the work function b. light of any frequency will cause photoelectrons to be emitted from metal A, but the lower the frequency, the...
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...
Ultraviolet light with a frequency of 1.3 x 10^15 Hz strikes a metal surface and ejects electrons that have a maximum kinetic energy of 1.104 x 10^-18 J. What is the work function (in J) of the metal?
1. Calculate the Work Function of a metal that has a threshold frequency of 9.54 x 1014 s-1. answer: 63.3*10^(-20)J 2. What is the wavelength of this light in nm? answer: 314nm 3. What would be the Kinetic Energy of an ejected photoelectron if 3.26 x 1015 s-1 light struck (hit) that same metal? answer: 1.53*10^(-18)J 4. What would be the velocity and De Broglie Wavelength of ejected photoelectron? answer: 1.83*10^(6)m/s 5.What is the wavelength of light (in nm) of...
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)...
9. (15 points) Electrons are emitted from the surface of a metal when it's exposed to light. This is called the photoclectric effect. Each metal has a certain threshold frequency of light, below which nothing happens. Right at this threshold frequency, an electron is emitted. The binding energy of a metal is the minimum amount of energy required to remove an electron from the surface of the metal. The binding energy for lithium metal is 279.7 kJ/mol (that is, it...
When ultraviolet light with a wavelength of 280 nm is incident on a particular metal surface, electrons are emitted via the photoelectric effect. The maximum kinetic energy of these electrons is 1.44 eV. (a) What is the work function of the metal? eV (b) What is the threshold frequency for this particular metal? Hz
1. A uniform light beam with frequency 3.0 × 1015 Hz and intensity 1.0 × 10-1 Wm-2 falls on a metal surface. The photoelectric work function of this metal is 2.0 eV. (a) (9 points) What is the maximal kinetic energy of an emitted electron? (b) (8 points) What is the maximal momentum of an emitted electron? (c) (8 points) What is the minimal de Broglie wavelength of an emitted electron
Question 7 1 pts When light of wavelength , illuminates the surface of Metal 1, the stopping voltage is V. In terms of V, what will be the stopping voltage if the same wavelength is used to illuminate the surface of Metal 2? The work function of Metal 1 is 5.7 eV and the work function of Metal 2 is 2.1 eV. 3.6 volts - V O V-3.6 volts OV+3.6 volts 2.1 volts - V 5.7 volts - V Consider...