COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 26, Problem 76QAP
To determine
The expression for Rydberg formula in terms of frequency of the photons that are emitted.
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Problems
• A beam of light with intensity of 3mW and a wavelength of 742 nm is
striking a solar cell. Estimate the number of photons incident on the
cell.
• If the dark saturation current of a solar cell is 1.7X10-8 A/m², the cell
temperature is 27 °C, and the short-circuit current density is 250
A/m?, Vmax = 0.526 V. Calculate the open-circuit voltage, Voci current
power, maximumlmax; power,maximunfatdensity
radiationsolar availablethe Whennmax.efficiency,maximum
W/m?
and
820 is
I Review | Constants Periodic Table
he human eye can barely detect a star whose intensity at the earth's
urface is 1.6 x 10-11 W/m?
Part A
If the dark adapted eye has a pupil diameter of 6.0 mm , how many photons per second enter the eye from the star? Assume the starlight has a wavelength of 550 nm
?
X•10"
N =
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Chapter 26 Solutions
COLLEGE PHYSICS
Ch. 26 - Prob. 1QAPCh. 26 - Prob. 2QAPCh. 26 - Prob. 3QAPCh. 26 - Prob. 4QAPCh. 26 - Prob. 5QAPCh. 26 - Prob. 6QAPCh. 26 - Prob. 7QAPCh. 26 - Prob. 8QAPCh. 26 - Prob. 9QAPCh. 26 - Prob. 10QAP
Ch. 26 - Prob. 11QAPCh. 26 - Prob. 12QAPCh. 26 - Prob. 13QAPCh. 26 - Prob. 14QAPCh. 26 - Prob. 15QAPCh. 26 - Prob. 16QAPCh. 26 - Prob. 17QAPCh. 26 - Prob. 18QAPCh. 26 - Prob. 19QAPCh. 26 - Prob. 20QAPCh. 26 - Prob. 21QAPCh. 26 - Prob. 22QAPCh. 26 - Prob. 23QAPCh. 26 - Prob. 24QAPCh. 26 - Prob. 25QAPCh. 26 - Prob. 26QAPCh. 26 - Prob. 27QAPCh. 26 - Prob. 28QAPCh. 26 - Prob. 29QAPCh. 26 - Prob. 30QAPCh. 26 - Prob. 31QAPCh. 26 - Prob. 32QAPCh. 26 - Prob. 33QAPCh. 26 - Prob. 34QAPCh. 26 - Prob. 35QAPCh. 26 - Prob. 36QAPCh. 26 - Prob. 37QAPCh. 26 - Prob. 38QAPCh. 26 - Prob. 39QAPCh. 26 - Prob. 40QAPCh. 26 - Prob. 41QAPCh. 26 - Prob. 42QAPCh. 26 - Prob. 43QAPCh. 26 - Prob. 44QAPCh. 26 - Prob. 45QAPCh. 26 - Prob. 46QAPCh. 26 - Prob. 47QAPCh. 26 - Prob. 48QAPCh. 26 - Prob. 49QAPCh. 26 - Prob. 50QAPCh. 26 - Prob. 51QAPCh. 26 - Prob. 52QAPCh. 26 - Prob. 53QAPCh. 26 - Prob. 54QAPCh. 26 - Prob. 55QAPCh. 26 - Prob. 56QAPCh. 26 - Prob. 57QAPCh. 26 - Prob. 58QAPCh. 26 - Prob. 59QAPCh. 26 - Prob. 60QAPCh. 26 - Prob. 61QAPCh. 26 - Prob. 62QAPCh. 26 - Prob. 63QAPCh. 26 - Prob. 64QAPCh. 26 - Prob. 65QAPCh. 26 - Prob. 66QAPCh. 26 - Prob. 67QAPCh. 26 - Prob. 68QAPCh. 26 - Prob. 69QAPCh. 26 - Prob. 70QAPCh. 26 - Prob. 71QAPCh. 26 - Prob. 72QAPCh. 26 - Prob. 73QAPCh. 26 - Prob. 74QAPCh. 26 - Prob. 75QAPCh. 26 - Prob. 76QAPCh. 26 - Prob. 77QAPCh. 26 - Prob. 78QAPCh. 26 - Prob. 79QAPCh. 26 - Prob. 80QAPCh. 26 - Prob. 81QAPCh. 26 - Prob. 82QAPCh. 26 - Prob. 83QAPCh. 26 - Prob. 84QAPCh. 26 - Prob. 85QAPCh. 26 - Prob. 86QAPCh. 26 - Prob. 87QAPCh. 26 - Prob. 88QAPCh. 26 - Prob. 89QAPCh. 26 - Prob. 90QAPCh. 26 - Prob. 91QAPCh. 26 - Prob. 92QAPCh. 26 - Prob. 93QAPCh. 26 - Prob. 94QAPCh. 26 - Prob. 95QAPCh. 26 - Prob. 96QAPCh. 26 - Prob. 97QAPCh. 26 - Prob. 98QAPCh. 26 - Prob. 99QAPCh. 26 - Prob. 100QAPCh. 26 - Prob. 101QAPCh. 26 - Prob. 102QAPCh. 26 - Prob. 103QAPCh. 26 - Prob. 104QAP
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- Problems • A beam of light with intensity of 3mW and a wavelength of 742 nm is striking a solar cell. Estimate the number of photons incident on the cell. • If the dark saturation current of a solar cell is 1.7X10-8 A/m2, the cell temperature is 27 °C, and the short-circuit current density is 250 A/m2, Vmax = 0.526 V. Calculate the open-circuit voltage, Voci current density at maximum power, Imax; maximum power, Pmaxi and maximum efficiency, nmax: When the available solar radiation is 820 W/m2arrow_forward• A beam of light with intensity of 3mW and a wavelength of 742 nm isstriking a solar cell. Estimate the number of photons incident on thecell.arrow_forward1. • Response of the eye. The human eye is most sensitive to BIO green light of wavelength 505 nm. Experiments have found that when people are kept in a dark room until their eyes adapt to the darkness, a single photon of green light will trigger receptor cells in the rods of the retina. (a) What is the fre- quency of this photon? (b) How much energy (in joules and eV) does it deliver to the receptor cells? (c) To appreciate what a small amount of energy this is, calculate how fast a typical bacterium of mass 9.5 x 10-12 g would move if it had that much energy.arrow_forward
- • Which among the following is a key process adopted for the laser beam formation as it undergoes the light amplification? A. spontaneous Emission, B. stimulated Emission, C. both A and B, D. none of the above. • In Stimulated Emission, which among the following parameters of generated photon is/are similar to the photon of incident wave? A. phase, B. frequency, C. polarization & direction of travel, D. all of the above. • In a LASER structure, the existence of standing waves is possible at frequencies for which the distance between the mirrors is an integral number of A. λ/2, 2/4, 2/6, D. 1/8. В. C. A/6, С.arrow_forwardSun 0.5 1.0 1.5 Wavelength in micrometers 0.1 2.0 Figure 1-2 Q2 Using Figure 1-2, answer/complete the following: • In Figure 1-2, what three regions of the EM spectrum are included? Identify the wavelength at which the Sun emits the most energy: dmax intensity Radiation intensity-arrow_forward• Using the Bohr model, estimate the energy of a Ka X-ray emittedby lead 1Z = 822arrow_forward
- 3. • A laser used to weld detached retinas emits light with a BIO wavelength of 652 nm in pulses that are 20.0 ms in duration. The average power expended during each pulse is 0.600 W. (a) How much energy is in each pulse, in joules? In electron volts? (b) What is the energy of one photon in joules? In elec- tron volts? (c) How many photons are in each pulse?arrow_forwardIntegrated Concepts A certain heat lamp emits 200 W of mostly IR radiation averaging 1500 nm in wavelength. (a) What is the average photon energy in joules? (b) How many of these photons are required to increase the temperature of a person's shoulder by 2.0°C, assuming the affected mass is 4.0 kg with a specific heat of 0.83kcal/kgC. Also assume no other significant heat transfer. (c) How long does this take?arrow_forwardWhich type of radiation is most suitable for the observation of diffraction patterns on crystalline solids; radio waves, visible light, or X-rays? Explain.arrow_forward
- Suppose the velocity of an electron in an atom is known to an accuracy of 2.0103 m/s (reasonably accurate compared with orbital velocities). What is the electron's minimum uncertainty in position, and how does this compare with the approximate 0.1-nm size of the atom?arrow_forwardIntegrated Concepts On its high power setting, a microwave oven produces 900 W of 2560 MHz microwaves. (a) How many photons per second is this? (b) How many photons are required to increase the temperature of a 0.500-kg mass of pasta by 45.0°C assuming a specific heat of 0.900kcal/kgC ? Neglect all other heat transfer. (c) How long must the microwave operator wait for their pasta to be ready?arrow_forward(a) If the power output of a 650-kHz radio station is 50.0 kW, how many photons per second are produced? (b) If the radio waves are broadcast uniformly in all directions, find the number of photons per second per square meter at a distance of 100 km. Assume no reflection from the ground or absorption by the air.arrow_forward
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