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anonymous
 one year ago
GIVING MEDALS AND FAN
1. Which of the following is the correct statement?
A photon of yellow light has more energy than a photon of ultraviolet light.
A photon of yellow light has less energy than a photon of ultraviolet light.
A photon of yellow light has less energy than a photon of red light.
A photon of blue light has more energy than a photon of ultraviolet light.
2. According to classical physics, which of the following should determine the velocity of the photo electrons ejected from a metallic surface?
photon energy
wavelength
frequency
intensity
anonymous
 one year ago
GIVING MEDALS AND FAN 1. Which of the following is the correct statement? A photon of yellow light has more energy than a photon of ultraviolet light. A photon of yellow light has less energy than a photon of ultraviolet light. A photon of yellow light has less energy than a photon of red light. A photon of blue light has more energy than a photon of ultraviolet light. 2. According to classical physics, which of the following should determine the velocity of the photo electrons ejected from a metallic surface? photon energy wavelength frequency intensity

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0(1) E (energy) = h (Plank's constant) × f (frequency) Which color has the highest frequency?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0A photon of yellow light has less energy than a photon of ultraviolet light for #1, but what did u get for #2

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.1hiunt: the kinetic energy KE of a photoelectron, is given by the subsequent formula: \[\Large KE = h\nu  W\] where \nu is the frequency of the incident light, and W is the so called "work function" of the material

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0If you look at this link http://www.cyberphysics.co.uk/topics/atomic/Photoelectric%20effect/Photoelectric%20effect.htm you can see in the description on the page that it is photonic energy

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.1W is the work function of the material from which the photoelectrons are emitted

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.1more explanation: only the electrons which compose the surface of the metal can be emitted. In order to do that, the incident light have to communicate to those electrons the energy W so those electrons can overcome the potential barrier of the at the surface of that metal

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0can u tell me the answer please youre just confusing me more

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.1your answer is the fundamental concept in modern physics, since the emitted electrons doesn't depend on the intensity of the incident light, as many phisicist believed, infact the number of emitted electrons depends on the frequency of the incident light, that is another result of the famous scientist Albert Einstein

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.1in other words, the kinetic energy depends on the photon energy, as you can see from my formula above

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so the answer is photon energy?

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.1yes! \[\Large \begin{gathered} \frac{1}{2}{m_e}v_e^2 = h\nu  W \hfill \\ \hfill \\ {v_e} = \sqrt {\frac{{2\left( {h\nu  W} \right)}}{{{m_e}}}} \hfill \\ \end{gathered} \]

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.1better is to say frequency, since when we perform an experiment about the photoelectic effect, we consider the frequency of the light used
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