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: A photon of frequency 7.9 x 1015 Hz incident on a metal plate and just <ncoked off an electron. The…

A:

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

A:

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: The intensity of the sunlight reaching the Earth's surface is 1268 W/m2 and the average wavelength…

A: Given:- The intensity of the sunlight reaching the Earth's surface is 1268 W/m2 and the average…

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

A:

Q: P12.27 Pulsed lasers are powerful sources of nearly mono- chromatic radiation. Lasers that emit…

A: Given data:  Time interval (t) = 5.00 ns = 5.00×10-9 s Total energy (ET) = 0.175 J Wavelength (λ) =…

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: A light beam of wavelength 679 nm and intensity 211 W/m^2 shines on a target of area 2.71 m^2 for a…

A: wavelength = intensity = area = A = 2.71 m2time = t = 2.23 s

Q: photons are emitted e

A:

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

A:

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: During this time, how many photons are emitted by the laser?

A:

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

A:

Q: To resolve an object in an electron microscope, the wavelength of the electrons must be close to the…

A:

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: 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: 4. Again, complete the following measurements using the simulator. Here, your goal is to find the…

A: The number of electrons detected for different wavelengths have been given in the table.As can be…

Q: The current of a beam of electrons, each with a speed of 1.200*10^3 m/s, is 9.000 mA. At one point…

A: Given,

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 current of a beam of electrons, each with a speed of 900 m/s, is 5.00 mA. At one point along its…

A: The energy associated with the electron beam before the potential step is the kinetic energy of the…

Q: X rays with a wavelength of 0.0700 nm diffract from a crystal. Two adjacent angles of x-ray…

A: Write the formula for the x-ray diffraction.

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…

A:

Q: How many photons per second are emitted by a monochromatic lightbulb (660  nm) that emits 45  W   of…

A:

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: Dinoflagellates are singlecell creatures that float in the world’s oceans; many types are…

A: Given data Number of photons emitted, n=100000000=108 Time , t=0.1s sec Wavelength of the light…

Q: A laser emits light at a wavelength of 678 nm. How many photons are required to emit 1 joule of…

A:

Q: If your cellphone camera needs at least 1000 photons per second to detect light of wavelength 481…

A: