Human skin is relatively insensitive to visible light, but ultraviolet radiation can cause severe burns. Does this have anything to do with photon energies? Explain.
Q: (a) Find the momentum (in kg · m/s) of a 79.5 keV x-ray photon. |kg · m/s (b) Find the equivalent…
A: Momentum, P= E/c ; c is the speed of photon where kinetic energy, E= 79.5 KeV= 79.5 * 1.6 * 10-19…
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A: we know that,h=6.63×10-34λ=0.840×10-9 mm=9.11×10-31 kg
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Q: A Blu-ray disc player uses a X 405mm, P = 5.00mW laser and can read one bit of data in At = 18. 5ns.…
A: Solution:Given:c = speed of light = 3.00 x 108 m/sh = Planck's constant = 6.63 x 10-34 J.sλ =…
Q: UV radiation photons with a wavelength of 3.45 ? 10^−7 ? are incident on a metal surface in a…
A: Given: Speed of light = c=3×108 m/s Wavelength of light = λ=3.45×10-7 Plank's constant =…
Q: Station KAIM in Hawaii broadcasts on the AM dial at 870 kHz, with a maximum power of 50,000 W. At…
A: From the expression of work function, E=hcλE=hf ∵f=cλ
Q: 21. Which of these statements is NOT TRUE about photons or photoelectric effect?
A: Photoelectric effect says that during the interaction of light radiation (UV rays usually) with a…
Q: A Blu-ray disc player uses a λ = 405mm, P = 5.00mW laser and can read 18.5ns. The energy emitted by…
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Q: Two scenarios: 1. A photon scatters off of a free electron and has a wavelength difference of…
A: The objective of the question is to determine which scenario more clearly demonstrates the particle…
Q: a) Calculate the number of photoelectrons per second ejected from a 0.75-mm² area of sodium metal by…
A: a) The required number of photo-electrons is, n=PE =IAhcλ =IAλhc…
Q: A photon with wavelength A = 400 nm hits a stationary electron and is scattered at an angle p = 30…
A: Answer..
Q: 2. A photon has a frequency of 7.50 x 10¹4 Hz, a. Determine the energy and the momentum of this…
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Q: The threshold of dark-adapted (scotopic) vision is 4.5 x 10-11 W/m² at a central wavelength of 500…
A: The number of photons per second entering the eye, can be calculated using the formula:The energy of…
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Q: 19. In a photoemission experiment, the maximum kinetic energies of photoelectrons from metals P, Q…
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Q: One molecule of ATP provides 0.3 eV when used by the cell. Photosynthesis in a typical plant uses 8…
A: Given Energy provided by an ATP molecule is EATP = 0.3 eV The wavelength of a photon is λ = 525 nm…
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A: Compton Scattering is the deviation of a photon after it collides with a charged particle. when…
Q: An ultraviolet light source illuminates a gold cathode with wavelengths between 137 nm and 288 nm.…
A: The maximum kinetic energy of electrons emitted from the cathode can be calculated using the…
Q: UV radiation having a wavelength of 127 nm falls on iron metal, whose work function is 4.50 ev. What…
A: Photon energy is given by E=hcλ h=6.626×10-34J·s is Planck's constant. c=3.0×108 m/s is the speed of…
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Q: In an photoelectric effect 0.500 moles of electrons are accelerated with the total speed of 3.61 x…
A: The photoelectric effect is a phenomena in which light causes electrons to be expelled from a…
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Q: A) In what part of the EM spectrum would a photon of energy 4.9 ✕ 10−17 J be found? microwave…
A: The objective of the question is to find out the part of the electromagnetic (EM) spectrum where a…
Q: 6. Lead (Pb) O = 4.3 eV Copper (Cu) 0 = 4.7 eV Nickel (Ni) O = 5.2 eV Three different metals are…
A: From the question, it is given that- Work function of Lead: ϕpb=4.3 eVWork function of Copper:…
Q: 4) The minimum frequency for the photoelectric effect to occur in a given metal is 5 x 10¹4 Hz. a)…
A: Given: Minimum frequency (fο) = 5 × 1014HzTo find: a) Work function of the metal (W) b)…
Q: Question 18 A photon having wavelength A scatters off a free electron at A (see figure), producing a…
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Q: How many photons per second are emitted by a monochromatic lightbulb (660 nm) that emits 45 W of…
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Q: A 0.703-nm photon collides with a stationary electron. After the collision, the electron moves…
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Q: The average threshold of dark-adapted (scotopic) vision is 4.00 x 10-11 W/m? at a central wavelength…
A: Photons are particles of light. Each photon will have a discreet amount of energy given by, E=hcλ…
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Q: The threshold of dark-adapted (scotopic) vision is 4.0 × 10−11 W/m2 at a central wavelength of 500…
A: It is given that,
Human skin is relatively insensitive to visible light, but ultraviolet
radiation can cause severe burns. Does this have anything to do with
photon energies? Explain.
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