What is the photoelectric effect, who discovered it and what is the key to explaining it?
What is the photoelectric effect, who discovered it and what is the key to explaining it?
Which of these was NOT a difficulty initially met in explaining the photoelectric effect? a. If light is a wave, its amplitude should have governed the energy imparted to electrons to cause their emission, and frequency should have had the effects it had. b. Increased intensity of the light did not increase the maximum kinetic energy of emitted electrons. c. Electrons could not escape from solid materials. d. Increased frequency of the light increased the maximum kinetic energy of the...
A. The photoelectric effect experiment provides evidence in support of what important physical concept? B. Describe how Einstein's explanation of the photoelectric effect provides evidence in support of this concept.
In his explanation of the threshold frequency in the photoelectric effect, Einstein reasoned that the absorbed photon must have the minimum energy required to dislodge an electron from the metal surface. This energy is called the work function (Φ) of that metal. What is the longest wavelength of radiation (in nm) that could cause the photoelectric effect in each of the following metals?
The photoelectric effect demonstrates the quantized nature of light. a) What is the kinetic energy and speed of an electron ejected from a Na surface with work function 2.28 eV when illuminated by light of wavelength i) 410 nm ii) 600 nm? b) What is the critical frequency fo of incident light below which no electrons are ejected? c) Sketch a graph of kinetic energy of the ejected electron vs. frequency of incident light for the photoelectric effect in sodium....
What did the photoelectric effect inspire De Broglie to posit? What is the physical proof of De Broglie’s premise?
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)...
I need help with this problem Problem 3: Photoelectric effect (10 pts) hat in the spend Problem 3: Photoelectric effect (10 pts) hat in the spend
The threshold wavelength for the photoelectric effect for silver is 262 nm. What is the work function 0for silver? What is the maximum kinetic energy K Emax of an emitted electron if the incident light has a wavelength of 212 nm? KEmax =
The photoelectric effect cannot be explained using classical mechanics but can be understood using quantum mechanics. Describe briefly (a) why a classical description of the photoelectric effect is wrong and (b) how a quantum mechanical description is correct
3. What is Photoelectric effect? What is stopping potential? Explain cutoff wavelength? What is the cut off wavelength (he) for a photoelectric materials of work function 1.3 eV? 4. Write Bohr's theory and assumptions for hydrogen atom with energy level diagram? What should be the energy of an atomic orbit of n=4? 5. Explain Radioactive rays (a, b, and y) ancd their properties? What is decay constant and decay rate? Calculate decay constant of a radioactive materials of half-life (T1/2)...