Imagine a source emitting 100 W of green light at a wavelength of 500 nm. How many photons per second are emerging from the source?

Q: By Amax Oi the pi LL alls on the same surface?

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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: 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: How much energy, in joules per mole (J/mol), does a photon in the microwave region of the EM…

A: Data provided:  Frequency (f) = 5.60×1010 s-1  Required: The energy of the photons in J/mol

Q: If all the energy from a 107 W light bulb is emitted on average at 666.0 nm, how many 666.0 nm…

A: Given data:  Wavelength of photon (λ) = 666.0 nm Rate of energy (P) = 107 W = 107 J/s Required:…

Q: A glass plate has a mass of 0.50 kg and a specific heat capacity of 840 J/(kg-C). The wavelength of…

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Q: Two sources of light emit X-rays of wavelength 1 nm and visible light of wavelength 500 nm,…

A: Given data- λ1=1 nmλ2=500 nmP=200 W

Q: Consider a photon with wavelength 0.011 nm. l = 0.011 nm What is the momentum of the photon in…

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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: A photon with an energy of 2.24 eV strikes a photoemissive surface whose work function is 1.57 eV.…

A: The minimum energy necessary to initiate the photoelectric effect from a metal surface is called the…

Q: if all the energy from a 93 W light bulb ?is emmited on average at 530.0 nm, how many 530.0 nm…

A: Given Data:- Power of the bulb is P=93 W Wavelength of each photon is  λ=530.0 nm  =530 nm×10-9 m1…

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

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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: 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: 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: For light with a wavelength of 350 nm and with an intensity of /= 10-8 W/m², what is the number of…

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Q: A 100-W sodium-vapor lamp emits yellow light of wavelength 590 nm. Calculate the number of photons…

A: Power ( P ) = 100 W Wavelength = 590 nm

Q: One of the first signs of sunburn is the reddening of the skin (called erythema). As a very rough…

A: Given : E = 14 mJ = 0.014 J λ = 308 nm = 308 × 10-9 m A = 1 cm2 = 1 × 10-4 m2

Q: helium-neon laser emits a light beam with a wavelength of 633 nm. The power of the laser beam is 1.0…

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Q: Suppose a linear accelerator (linac) creates a X-ray beam where every individual photon has an…

A: Energy of a single photon is E=  19MeV = 19 x 106 cVTotal number of photon is n = 3 x 1010Total time…