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[DOCX File]Photo-Electric Effect Graph
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(You will need to convert eV to J – and don’t forget the frequency is x1012) Find the maximum and minimum slope possible. Express Planck’s constant as a best guess +/- a two digit uncertainty based on this data. Use the extrapolation of the cutoff frequency to deduce the work function in eV. Express it as a best guess with an upper and lower limit. Do this by hand on graph paper. Author ...
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[DOC File]Photo-Electric Effect Graph
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(You will need to convert eV to J – and don’t forget the frequency is x1012) Find the maximum and minimum slope possible. Express Planck’s constant as a best guess +/- a one digit uncertainty based on this data. Use the extrapolation of the cutoff frequency to deduce the work function in eV. Express it as a best guess with an upper and lower limit. Do this by hand on graph paper. Title ...
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[DOCX File]leavingcertphysics.weebly.com
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eV) 4. The . anode focuses. the beam of . electrons . on to the . fluorescent screen. 5. The . X and Y plates. move the beam of electrons ...
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[DOCX File]Planck’s Equation Practice Problems - MR. WILLARD'S NOTES
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Convert 5 Joules into an electron volt. Draw the electron excitation example. What is the relationship between E. f and E i with regards to the energy of a photon E photon.Planks Equation . where: E = h = f = Example #1. Determine the smallest amount of energy from a light source that emits light at a frequency of 4.50 x1014 Hz. Example #2 . Determine the minimum energy transferred by a light ...
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[DOCX File]WordPress.com
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Find the Energy of one EMR particle with a frequency of 1.25 x 1016Hz. Solve in eV. Find the energy in Joules of Red light with a wavelength of 725 nm. Einstein, who worked closely with Planck, called these “particles” of EMR _____. Since all EMR travels the speed of light in a vacuum, convert a radio wave with 101.3 MHz into wavelength.
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[DOCX File]thequarkyteacher.files.wordpress.com
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2021-02-06 · Convert 4.16 x 10-18J into eV. 2. What is the energy (in eV) of a photon of blue visible light with a wavelength of 4455nm? 3. A source of monochromatic light has a wavelength of 710nm. The light is passed through two slits which are 2.6mm apart and the resulting interference pattern is displayed on a screen 3m from the slits. What would be expect the distance between the first two bright ...
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[DOC File]DETERMINATION OF PLANCK’S CONSTANT USING LEDS
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You will need to convert wavelength to meters before plotting. Do a least square line fit to obtain the slope. The value of the slope = h. This is obtained from E=qV=eV=h x frequency +k = hc/wavelength + k. Set e = 1 to use electron volt as energy unit. If the line fit program you used does not provide a measure of the uncertainty in the slope (like standard deviation or standard error) find ...
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SACE Stage 2 Physics
Hence if the photon has sufficient energy (greater than the threshold frequency) then electrons escape from the surface of a metal when light is incident on the surface. (a) Work function = hfo = 6.63 x 10-34 x 5 x 1014 = 3.3 x 10-19 J . Now an energy of 1 electron-volt is that energy gained by an electron passing through a potential difference of 1 volt, i.e. 1 eV = 1.6 x 10-19 joule. Hence ...
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[DOC File]Weebly
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Convert 4.5 eV into joules. a) 7.2 x 10-19 J. 2.8 x 10-19 J. c) 2.8 x 1019 J. d) 4.5 x 10-19 J . What statement must be true for the photoelectric effect to occur? a) Wo > VStop. b) Wo < VStop. c) Ephoton > Vstop. d) Ephoton > Wo. What is the energy of a photon that has a wavelength of 460 nm? a) 3.05 x 10-41 J. b) 4.32 x 10-28 J. c) 4.32 x 10-19 J. d) 3.05 x 10-9 J When electromagnetic ...
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[DOCX File]nwillard.weebly.com
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Joules and eV example: Convert 5 Joules into an electron volt. Draw the electron excitation example. ... You buy a laser at the store and read on the label that it has a frequency of 4.38 x 1015 Hz. The label also says that it runs at 4.06 mW (miliwatt). Determine how many photons it can release in one second. Energy into ev – one more way to use an eV with energy. E = hf E = hc/λ convert ...
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Convert ev to frequency