An owl has good night vision because its eyes can detect a light intensity as small as 5.0 x 10-13 W/m2. What is the minimum number of photons per second that an owl eye can detect if its pupil has a diameter of 8.5 mm and the light has a wavelength of 510 nm?

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

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Q: The stopping potential of a photoelectric diode is 8 volts. e/m = 1.8 × 10¹¹ C kg ¹, then what is…

A: To find-Velocity=?Given-Stopping potential (Vs)=9 Vem=1.8×1011 C/kg

Q: Fluorescence microscopy, discussed in Section 29.8, is an important tool in modern cell biology. A…

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Q: A solid metal sphere emits 1.42 ✕ 1020 photons every second with a radiating power of 2.53 W.…

A: power radiated = enrgy radiated per second = 2.53 J /sec  photons released per second  = 1.42 × 1020…

Q: Question 2: a. In a Compton scattering, a photon of wavelength (439)x1omis collided with an electron…

A: (a) From the Compton scattering, we know that, Here, λ denotes the wavelength of the electron after…

Q: A light beam of wavelength 596 hm and intensity 251 W/m^2 shines on a target of area 2.47 m^2 for a…

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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 boy walked in the evening in the park with the flashlight with a power of 20 W . The flashlight…

A: a) To find the ratio A between the area of the sheet of paper and the surface area of a sphere with…

Q: Light of frequency 9.6 x 1014 Hz is incident on a metal surface. The stopping potential for this…

A: Given Data: Frequency of the light is The stopping potential is To Find: The work required for an…

Q: photons are emitted e

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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…

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Q: The stopping potential of a photoelectric diode is 8 volts. e/m = 1.8 x 10" C kg ', then what is its…

A: Given, stopping potential Vo = 8 V                        e/m = 1.8 × 1011 C kg-1…

Q: Germicidal lamps are used to sterilize tools in biological and medical facilities. One type of…

A: Given: The wavelength of light is λ=254 nm. The diameter of tube is d=15 mm. The length of the tube…

Q: An atom initially in an energy level with -6.43 eV absorbs a photon that has wavelength 850 nm. What…

A: Given, Initial energy level=-6.43 eV wavelength λ=850nm c=3×108m/s h=6.626×10-34 m2 kg/s

Q: A 76-kW AM radio station broadcasts at 1000 kHz. How many photons are emitted each second by the…

A: The wavelength of light and energy per unit photon are inversely related. The energy of a photon is…

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: 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: Just like the optical part of the spectrum, radio waves can be described in terms of photons -…

A: Given data:  A radio wave  Frequency (f) = 88.5 MHz = 88.5×106 Hz Required: The energy in Joules and…

Q: The work function of platinum is 6,2 eV. If the frequency of the ultraviolet light is 8,0 x 10-16 Hz…

A: Work function of platinum is Frequency of incident light f =

Q: In a Compton scattering, a photon of wavelength (439) nm is collided with an electron and scattered…

A: Part (a) Given: The wavelength of photon is λ=439 nm. The angle of the scattering is θ=69∘. The…

Q: lue laseT beam 1s incidehi on a Ime causing lo be ejectc ihe melal. II the frequency of the laser…

A: given, frequency of incident beam= increased intensity of laser beam = unchanged

Q: A laser emits light at wavelength A = 598 nm in a beam of diameter 3.7 mm and at an energy-emission…

A: Given  Wavelength λ = 598 nm = 5.98×10-7 m Diameter d = 3.7mm = 3.7×10-3 m Energy-emission rate P =…

Q: The potential potential of a photoelectric diode is 8 volts. e/m = 1.8 x 10¹¹ C kg ¹, then what is…

A: To find-Velocity=?Given-Stopping potential (Vs)=9 Vem=1.8×1011 C/kg

Q: The human eye is a complex detector for visible light. The optic nerve needs a minimum of 2.0 x…

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Q: A phototransistor with the characteristic shown in Figure 3 has a supply voltage of 20 V and a…

A: Given:supply voltage, VCC = 20 Vload resistance, RC = 2.50 kΩalso the output characteristics are…

Q: The boy walked in the evening in the park with the flashlight with a power of 20  W  . The…

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Q: The Empire State building in New York City is approximately 1250 ft1250 ft tall. How many U.S. half…

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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: 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 stopping potential of a photoelectric diode is 8 volts. e/m = 1.8 × 10¹¹ C kg ¹, then what is…

A: To find-Velocity=?Given-Stopping potential (Vs)=9 Vem=1.8×1011 C/kg

Q: I need some help with the following problem. 1a. What is the maximum number of electrons that can be…

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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