Physics for Scientists and Engineers
6th Edition
ISBN: 9781429281843
Author: Tipler
Publisher: MAC HIGHER
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Question
Chapter 31, Problem 20P
To determine
The number of photons if the look for a tenth of a second at sun and the absorption of energy by the human eye.
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Students have asked these similar questions
The energy flux of sunlight reaching the surface of the earth is 1.388 x 10³ w/m?. How
many photons (nearly) per square metre are incident on the Earth per second? Assume
that the photons in the sunlight have an average wavelength of 550 nm.
The intensity of the sunlight reaching the Earth's surface is 1268 W/m2 and the average wavelength of the sunlight is 550 nm.
(A) Energy of each photon =
(B) Number of photons in the sunlight reaching the Earth's surface per square meter per second =
(C) Energy deposited on a solar-panel of size 3.4 m x 2 m per second =
(D) Energy converted to electricity per second by this solar-panel if its efficiency is 27.4% =
energy flux of sunlight reaching the surface of
the earth is 1.388 x 10^3 W/m^2. How many
photons (nearly) per square meter are incident
on the Earth per second? Assume that the
photons in the sunlight have an average
wavelength of 550 nm.
Chapter 31 Solutions
Physics for Scientists and Engineers
Ch. 31 - Prob. 1PCh. 31 - Prob. 2PCh. 31 - Prob. 3PCh. 31 - Prob. 4PCh. 31 - Prob. 5PCh. 31 - Prob. 6PCh. 31 - Prob. 7PCh. 31 - Prob. 8PCh. 31 - Prob. 9PCh. 31 - Prob. 10P
Ch. 31 - Prob. 11PCh. 31 - Prob. 12PCh. 31 - Prob. 13PCh. 31 - Prob. 14PCh. 31 - Prob. 15PCh. 31 - Prob. 16PCh. 31 - Prob. 17PCh. 31 - Prob. 18PCh. 31 - Prob. 19PCh. 31 - Prob. 20PCh. 31 - Prob. 21PCh. 31 - Prob. 22PCh. 31 - Prob. 23PCh. 31 - Prob. 24PCh. 31 - Prob. 25PCh. 31 - Prob. 26PCh. 31 - Prob. 27PCh. 31 - Prob. 28PCh. 31 - Prob. 29PCh. 31 - Prob. 30PCh. 31 - Prob. 31PCh. 31 - Prob. 32PCh. 31 - Prob. 33PCh. 31 - Prob. 34PCh. 31 - Prob. 35PCh. 31 - Prob. 36PCh. 31 - Prob. 37PCh. 31 - Prob. 38PCh. 31 - Prob. 39PCh. 31 - Prob. 40PCh. 31 - Prob. 41PCh. 31 - Prob. 42PCh. 31 - Prob. 43PCh. 31 - Prob. 44PCh. 31 - Prob. 45PCh. 31 - Prob. 46PCh. 31 - Prob. 47PCh. 31 - Prob. 48PCh. 31 - Prob. 49PCh. 31 - Prob. 50PCh. 31 - Prob. 51PCh. 31 - Prob. 52PCh. 31 - Prob. 53PCh. 31 - Prob. 54PCh. 31 - Prob. 55PCh. 31 - Prob. 56PCh. 31 - Prob. 57PCh. 31 - Prob. 58PCh. 31 - Prob. 59PCh. 31 - Prob. 60PCh. 31 - Prob. 61PCh. 31 - Prob. 62PCh. 31 - Prob. 63PCh. 31 - Prob. 64PCh. 31 - Prob. 65PCh. 31 - Prob. 66PCh. 31 - Prob. 67PCh. 31 - Prob. 68PCh. 31 - Prob. 69PCh. 31 - Prob. 70PCh. 31 - Prob. 71PCh. 31 - Prob. 72PCh. 31 - Prob. 73PCh. 31 - Prob. 74PCh. 31 - Prob. 75PCh. 31 - Prob. 76PCh. 31 - Prob. 77PCh. 31 - Prob. 78PCh. 31 - Prob. 79PCh. 31 - Prob. 80PCh. 31 - Prob. 81PCh. 31 - Prob. 82PCh. 31 - Prob. 83PCh. 31 - Prob. 84P
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- The threshold of dark-adapted (scotopic) vision is 2.8 ✕ 10−11 W/m2 at a central wavelength of 500 nm. If light with this intensity and wavelength enters the eye when the pupil is open to its maximum diameter of 8.4 mm, how many photons per second enter the eye? _________photons/sarrow_forwardA glass plate has a mass of 0.50 kg and a specific heat capacity of 840 J/(kg-C). The wavelength of infrared light is 14 x 10 m, while the wavelength of blue light is 4.7 x 107m. Find the number of infrared photons and the number of blue photons needed to raise the temperature of the glass plate by 2.0 °C, assuming that all the photons are absorbed by the glass. Nudrored Number Units Nyisible - Number Unitsarrow_forwardThe threshold of dark-adapted (scotopic) vision is 4.5 x 10-¹1 W/m² at a central wavelength of 500 nm. If light with this intensity and wavelength enters the eye when the pupil is open to its maximum diameter of 9.0 mm, how many photons per second enter the eye? Xarrow_forward
- The human eye is a complex sensing device for visible light. The optic nerve needs a minimum of 2.0 10-17 J of energy to trigger a series of impulses that eventually reach the brain. (a) How many photons of red light (670. nm) are needed? photons(b) How many photons of blue light (470. nm) are needed? (include significant figures)arrow_forwardThe average threshold of dark-adapted (scotopic) vision is 4.00 10-11 W/m2 at a central wavelength of 500 nm. If light with this intensity and wavelength enters the eye and the pupil is open to its maximum diameter of 9.00 mm, how many photons per second enter the eye? photons/sarrow_forwardSuppose a hot object radiates with the twice the intensity as the sun on earth, i.e. 2600W/m2. What is the energy density of this radiation?arrow_forward
- Question: The electronic structure of atoms and molecules may be investigated using photoelectron spectroscopy. An electron in a photoelectron spectrometer is accelerated from rest by a uniform electric field to a speed of 420 km s−1 in 10 µs. Determine the kinetic energy of the electron?arrow_forwardA 193-nm-wavelength UV laser for eye surgery emits a 0.500 mJ pulse. How many photons does the light pulse contain?arrow_forwardConsider a green LED that draws 5 µW of power. Assuming all the power going into the LED is emitted as 520 nm light, how many photons are emitted from the LED every second? 6.11 x 1017 photons/s 4.52 x 1019 photons/s O 1.31 x 1013 photons/s O 1.45 x 1024 photons/sarrow_forward
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