The most common fluorescent lightbulbconverts ultraviolet light from mercury atoms to white light. If anultraviolet photon of wavelength 185 nm is emitted by a mercuryatom and absorbed by the phosphor, what is the maximum number of red 655-nm photons that the phosphor can emit?

Q: A sodium vapor lamp (λ = 589 nm) with a power of 100 W radiates evenly in all directions. With what…

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Q: A lead atom loses an electron from the L-shell(72.2 KeV). An electron from M-shell (84.1KeV)…

A: Given Energy of electron in L-shell (E1) =72.2 KeV Energy of electron in M-shell (E2) =84.1 KeV

Q: A narrow beam of 0.5 MeV photons is incident normally on a 3 mm iron slab. What fraction of the…

A: Given data: The energy of the photon is E=0.5 MeV. The thickness of the slab is t=3 mm. The mass…

Q: An atom (not a hydrogen atom) absorbs a photon whose associated wavelength is Aab and then…

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Q: An electron has a kinetic energy of 5.4 eV. What is the energy of a photon whose wavelength is the…

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Q: Assuming that 10.0% of a 100 W light bulb's energy output is in the visible range (typical for…

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Q: A 100-W bulb emits red light ( = 700 nm) uniformly in all directions. a) How many photons are…

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Q: Explain why characteristic x rays are the most energetic in the EM emission spectrum of a given…

A: The electromagnetic radiation is emitted by an atom when an inner shell vacancy is filled is called…

Q: A solid metal sphere emits 1.67 x 1020 photons every second with a radiating power of 2.33 W. (a)…

A: Given : N = 1.67 × 1020 t = 1 second P = 2.33 W

Q: Most microwave ovens emit electro-magnetic radiation with a wavelength () of 12.24 cm. This EM-…

A: Given: case odf microoven heating water Wavelength  = 12.24 cm Rate of photon emission r =…

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: If 5 percent of the energy supplied to an incandescent light buld is radiated as visible light, how…

A: Given : wavelength of visible light = 560 nm

Q: EM radiation of wavelength 445 nm having an intensity of 1.31 kW/m2 is incident on a 1.90 mm2 area…

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Q: (a) By what factor are the energies of its hydrogen-like levels greater than those of hydrogen? (b)…

A: The smallest constituent, which together makes an element and consists of three subparts, is known…

Q: what minimum acceleration voltage would be required to produce an x-ray with a wavelength of 70.0 pm

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Q: A stabilized He-Ne laser operates at a wavelength of λ=632.8 nm and has a bandwidth of Δν=1 kHz. The…

A: Given: The He-Ne laser operates at a wavelength of λ=632.8 nm The bandwidth of the laser is Δν=1 kHz…

Q: I have a physocs question as follows : Photons of wavelength 140 nm are incident on a metal. The…

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Q: Ultraviolet light at 290 nm does 250 times as much cellular damage as an equal intensity of…

A: Given: The wavelength of the first light is 290 nm. The wavelength of the second light is 310 nm.…

Q: In a He-Ne gas laser an electrical discharge pumps helium atoms to a 20.61 eV excited state. This…

A: The initial KE of neon is 20.66 eV. The final KE of neon is 18.70 eV. The energy lost is then…

Q: Suppose. photons are scattered through a thin aluminum foil. A detector starts at 0° and is slowly…

A: Concept used: Photons are scattered at different angles when hit through an aluminum foil. This can…

Q: The Avorge wavelength of the light emitted by a costain 100 w light bulb is 4x10 m. How many…

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Q: A boy walks in the evening in the park with a flashlight with a power of 25 W . The flashlight bulb…

A: Given: Power of bulb P=25 W=25 J/s, Wavelength of light λ=490 nm=490×10-9 m, Distance from bulb R=17…

Q: A so

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Q: The half-value layer for Tc-99m photons in water is 4.6 cm. Since soft tissue has about the same…

A: Given Data: Half value layer =4.6cm To Find: What percent of the beam passes through 3cm of fat.

Q: Imagine you are testing a solar cell in your lab. You irradiate the solar cell with photonsfrom an…

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Q: The binding energy of Sodium is 2.28eV. Calculate the number of photoelectrons ejected from a…

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Q: 8. Now, as we decrease the brightness of the light, record the # electrons and detection time, and…

A: Here, the given data is the value of the electron detected and the detection time at different…

Q: A method of cancer treatment known as gamma knife radio- therapy uses multiple beams of gamma rays…

A: Given that: Eo=1.17 MeV=1.17×106×1.6×10-19 J=1.872×10-13 Jϕ=70°moc2=0.511 MeVmoc=0.511…

Q: In the figure, thex rays shown are produced when 35.0 keV electrons strike a molybdenum target. If…

A: Given:- The x-rays shown are produced when 35.0 keV electrons strike a molybdenum target. If the…

Q: Photons Of Frequency v ,incident upon a photo sensitive metal surface with work function Φ, knock…

A: SOlution:

Q: Calculate the number of electrons required to to produce radiation at 590 nm, N590 having linewidth…

A: The energy of radiation is  ∆E=hcλ2∆λ  .............................................. (1) where ∆λ…

Q: Photons are scattered through a thin aluminum foil. Find the change in wavelength of the photons, in…

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…

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…

Q: A free electron in a gas is struck by a 5.95 nm X-ray, which experiences an increase in wavelength…

A: Given: The wavelength of an electron before being struck by the x-ray is λ = 5.95 nm The increase in…

Q: An atom in a state with its orbital quantum number l = 1 decays to its ground state (with l = 0). A…

A: Step 1: Step 2: Step 3: Step 4: