How many photons per second are emitted by a 7.50 mW CO2 laser that has a wavelength of 10.6 mm?

Q: What is the wavelength of the photon with energy E = 3.1 × 10-16 J. Use the unit of nm for the…

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Q: The energy flux of sunlight reaching the surface of the earth is 1.388 x 10° W/m?. How many photons…

A: The concept behind this is the dual nature of radiation and matter. We have been provided with…

Q: The human eye can barely detect a star whose intensity at the earth’s surface is 1.6 x 10-11 W/m2.…

A: The energy at the human eye with the given intensity, E1=IAt=I4πr2t   Substitute, E1=1.6×10-11…

Q: What is the wavelength (in nm) of a photon with momentum 1.93 x 1027 kg m/ s?

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Q: The energy (in electron-volts) for a photon with a wavelength 439.8 nm is:

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Q: What is the energy (in eV) of the following photons? A 450-nm photon of blue light?

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Q: A 633 nm helium-neon laser puts out 4.00 W of power with a beam 5.70 mm in diameter. The beam is…

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Q: A dental X-ray typically affects 195 g of tissue and delivers about 3.85 µJ of energy using X-rays…

A: The mass of tissue is m=195 g=0.195 kg Delivered energy is E=3.85 μJ=3.85×10-6 J The wavelength of…

Q: What is the wavelength of the photon with energy E = 5.4 × 10-15 J. Use the unit of nm for the…

A: Write a given values of this question. E=5.4×10-15Jh=6.63×10-34J-sc=3×108m/s

Q: A laser emits 6.85 x 1018 photons per second in a thin beam with circular cross section having…

A: Power p= energy/ time. Power developmed by 1 photon. Time t = 1 sec P = E/t. P= hC/wavelength *t. P…

Q: A dental X-ray typically affects 215 g of tissue and delivers about 3.95 µJ of energy using X-rays…

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Q: How many photons are produced in a laser pulse of 0.824 J at 507 nm?

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Q: The human eye is able to detect as little as 2.35×10−18 J of green light of wavelength 510 nm.…

A: E=2.35×10-18 Jλ=510 nm = 510×10-9 m

Q: What is the energy (in eV) of a photon with 150 nm wavelength?

A: Given Wavelength of light = λ = 150 nm We have to calculate the energy in eV

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: 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…

Q: The average threshold of dark-adapted (scotopic) vision is 4.00  10-11 W/m2 at a central wavelength…

A: Calculate the total energy. Total energy = Intensity x area                     = 4x 10-11 x π (9 x…

Q: When an ultraviolet photon is absorbed by a molecule of DNA, the photon’s energy can be converted…

A: Edamage=Ephoton=hcλ

Q: What is the wavelength of a 1.40-eV photon?

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Q: A 193-nm-wavelength UV laser for eye surgery emits a 0.500 mJ pulse. How many photons does the light…

A: The expression for find number of photons contains in the light pulse is n=Ehcλ

Q: A helium–neon laser emits laser light at a wavelength of 632.8 nm and a power of 2.3 mW. At what…

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Q: A photon has 1.86 eV of energy. What is the photon’s wavelength? (h = 6.626 x 10-34, 1 eV = 1.6 x…

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Q: energy flux of sunlight reaching the surface of the earth is 1.388 x 10^3 W/m^2. How many photons…

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Q: A laser produces 22.0 mW of light. In 4.00 hr, the laser emits 7.08×10^20 photons.What is the…

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