Problem A small helium-neon laser (2=632.8 nm) produces a light beam with an average power of 3.5 mW and a diameter of 2.4 mm. How many photons per second are emitted by the laser?

Q: When the light of wavelength 250 nm is incident on a metal surface, the maximum speed of the…

A: Using Einstein's photoelectric equation : E = W + Kmax hv = W + 12m vmax2W =hθ  -  12m vmax2W =hcλ…

Q: Under ideal conditions, a visual sensation can occur in the human visual system if light of…

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Q: Which type of light has the most energy per photon? ultraviolet infrared green visible X-ray

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Q: A dental X-ray typically affects 194 g of tissue and delivers about 3.6 µJ of energy using X-rays…

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Q: The intensity of sunlight that can be captured and detected by a visible light detector which has a…

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Q: A visible (red) emission spectral line for cadmium (Cd) occurs at wavelength λ = 655.980 nm. What…

A: Using the formula, C= v * lambda, C = speed of light v= frequency of the radiation Lambda is the…

Q: The threshold of dark-adapted (scotopic) vision is 4.5 x 10-11 W/m² at a central wavelength of 500…

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Q: Cesium has a work function of 2.14 eV where 1.0 eV = 1.602 x 10^-9J. If radiation with a wavelength…

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Q: A particular metal is illuminated by UV photons of wavelength 210 nm, and electrons up to 1.25 eV…

A: Photoelectrons are ejected by metals when the light of a suitable wavelength falls on them. The…

Q: One molecule of ATP provides 0.30 eV when it is used to power cellular processes. Photosynthesis in…

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Q: The intensity of sunlight hitting the surface of the earth on a cloudy day is about 0.50 kW/m2.…

A: I=Intensity=0.5 kW/m2d=Diameter of eye=2 mmr=Radius of eye=22=1 mmλ=Wavelength=550 nmt=Time=1 s

Q: A strange metallic rock is found and is being tested. Suppose that light with a frequency of 9.40 ✕…

A: Given: Frequency ν=9.40×1014 Hz Stopping potential Vs=1.50 V Standard data used: Planck's constant…

Q: A 1.00 mW helium-neon laser emits a visible laser beam with a wavelength of 633 nm. How many photons…

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Q: Exposure to a sufficient quantity of ultraviolet light will redden the skin, producing erythema—a…

A: Given: The first energy that produce reddening is E1=3.7 mJ. The first wavelength is λ1=254 nm. The…

Q: 5.00-eV photons are incident on a metal, generating photoelectrons that have a maximum kinetic…

A: Given data- Energy of photon E=5.00 eV maximum kinetic energy KEmax=0.69 eV Work function=W

Q: Plus dye laser emits light of energy of photon 3.6 eV in 0.25 ms pulses to remove skin blemishes…

A: Energy (E) = 3.6 eV t = 0.25 ms Power = 15 W

Q: A laser is used in eye surgery to weld a detached retina back into place. The wavelength of the…

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Q: A 1000 W carbon dioxide laser emits an infrared laser beam with a wavelength of 10.6 mm. How many…

A: The energy of a photon is, Ehcλ   Substitute, E=6.626×10-34 J.s3×108 m/s10.6mm×10-3 m1…

Q: Suppose an argon laser emits 1.49 * 1019 photons per second,half with a wavelength of 488.0 nm and…

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Q: A particular metal is illuminated by UV photons of wavelength 210 nm, and electrons up to 1.25 eV…

A: Given: λ1=210 nm λ2=175 nm

Q: X-ray with wavelength 0.2 nm are scattered from a carbon block. The scattered radiation is viewed at…

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