EBK PHYSICS FOR SCIENTISTS & ENGINEERS
5th Edition
ISBN: 9780134296074
Author: GIANCOLI
Publisher: VST
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Chapter 37, Problem 9P
To determine
The energy range of photons in the visible spectrum, of wavelength.
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(II) Show that the energy E (in electron volts) of a photon
whose wavelength is A (nm) is given by
1.240 x 10° eV·nm
E =
λ (nm)
Use at least 4 significant figures for values of h, c, e (see
inside front cover).
(c)
The energy of an ultraviolet light is 3.28 eV.
Tenaga cahaya ultraviolet adalah 3.28 eV.
(i)
What is its wavelength? (Given: h=6.63×10-34
Js ; e=1.602×10-19
C).
Berapakah panjang gelombangnya? (Diberi: h=6.63×10-34 Js ; e=1.602×10-19 C).
nm
(ii)
Based on the de Broglie's hypothesis, determine the velocity of the electron. (Given: h=6.63x10 34 Js ; me=9.11x10 31 kg)
(i) How does one explain the emission of electrons from a photosensitive surface with the help of Einstein’s photoelectric equation?
(ii) The work function of the following metals is given : Na = 2.75 eV, K = 2.3 eV, Mo = 4.17 eV and Ni 5.15 eV. Which of these metals will not cause photoelectric emission for radiation of wavelength 3300 A from a laser source placed 1 m away from these metals? What happens if the laser source is brought nearer and placed 50 cm away?
Chapter 37 Solutions
EBK PHYSICS FOR SCIENTISTS & ENGINEERS
Ch. 37 - Prob. 1QCh. 37 - Prob. 2QCh. 37 - Prob. 3QCh. 37 - Prob. 4QCh. 37 - Prob. 5QCh. 37 - Prob. 6QCh. 37 - Prob. 7QCh. 37 - Prob. 8QCh. 37 - Prob. 9QCh. 37 - Prob. 10Q
Ch. 37 - Prob. 11QCh. 37 - Prob. 12QCh. 37 - Prob. 13QCh. 37 - Prob. 14QCh. 37 - Prob. 15QCh. 37 - Prob. 16QCh. 37 - Prob. 17QCh. 37 - Prob. 18QCh. 37 - Prob. 19QCh. 37 - Prob. 20QCh. 37 - Prob. 1PCh. 37 - Prob. 3PCh. 37 - Prob. 7PCh. 37 - Prob. 9PCh. 37 - Prob. 13PCh. 37 - Prob. 25PCh. 37 - Prob. 26PCh. 37 - Prob. 27PCh. 37 - Prob. 32PCh. 37 - Prob. 34PCh. 37 - Prob. 37PCh. 37 - Prob. 45PCh. 37 - Prob. 52PCh. 37 - Prob. 76GPCh. 37 - Prob. 77GP
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- (i) Monochromatic light of frequency 6.0 × 1014 Hz is produced by a laser. The power emitted is 2.0 × 10-3 W. Estimate the number of photons emitted per second on an average by the source. (ii) Draw a plot showing the variation of photoelectric current versus the intensity of incident radiation on a given photosensitive surface.arrow_forward(b) (i) Calculate the de Broglie wavelength of an electron having a mass of 9.11 x 1031 kg and a charge of 1.602 x 10-19 J with a Kinetic energy of 135 eV. The value of the Planck's constant is equal to 6.63 * 10-34 Js. (ii) Assume that an electron is moving along the x-axis with a speed of 3.66 x 106 m/s and with a precision of 0.50%. Calculate the minimum uncertainty (as allowed by the uncertainty principle in quantum theory) with which the position of the electron along the X-axis simultaneously can be measured with the speed?arrow_forward19). To get a de Broglie wave that is visible to human eyes (size-wise, not visibility-wise, so A > 0.1 mm), of an particle, what particle should it be and what is the greatest speed it can be moving? Table 33.2 may be helpful.arrow_forward
- (b) Calculate the de Broglie wavelength of an electron having a mass of 9.11 x 10-31 kg and a charge of 1.602 x 10-19 J with a Kinetic energy of 110 eV. The value of the Planck’s constant is equal to 6.63 * 10-34 Js.arrow_forwardThree light sources are shone onto a plant: i) ii) iii) How much light (i.e. total number of photons) is available for the plant to use for photosynthesis over an 8 hr photoperiod, considering the plant has a total leaf area of 0.175 m? 320 nm at an intensity of 200 umol photons.ms 440 nm at an intensity of 300 umol photons.ms 675 nm at an intensity of 300 umol photons.ms'arrow_forward(i) Define the term ‘threshold frequency’ as used in photoelectric effect. (ii) Plot a graph showing the variation of photoelectric current as a function of anode potential for two light beams having the same frequency but different intensities I1 and I2 (I1 > I2 ).arrow_forward
- (c) The energy of an ultraviolet light is 3.28 ev. Tenaga cahaya ultraviolet adalah 3.28 ev. What is its wavelength? (Given: h=6.63x1034 Js ; e=1.602x10-19 C). Berapakah panjang gelombangnya? (Diberi: h=6.63x1o-34 Js ; e=1.60 (i) nm Based on the de Broglie's hypothesis, determine the velocity of the electron. (Given: h=6.63x10-34 Js ; m,=9.11x10-31 kg) (ii) Merujuk kepada hipotesis de Broglie's, tentukan halaju elektron. (Diberi: h=6.63x10-34 Js ; m =9.11x1031 kg). kgarrow_forwardThe energy of an ultraviolet light is 3.28 eV. (i) What is its wavelength? (Given: h=6.63✕10-34 Js ; e=1.602✕10-19 C). (ii) Based on the de Broglie's hypothesis, determine the velocity of the electron. (Given: h=6.63✕10-34 Js ; me=9.11✕10-31 kg).arrow_forward(a) What is the energy in joules of an x-ray photon with wavelength 1.58 x 10-10 m? J (b) Convert the energy to electron volts. kev (c) If more penetrating x-rays are desired, should the wavelength be increased or decreased? O increased decreased (d) Should the frequency be increased or decreased? increased decreasedarrow_forward
- What is the minimum wavelength in m of the x-ray photons from a 140 kV x-ray tube? (h = 6.63x10-34J·s, 1 eV = 1.6x10-19 J, c = 3.0x108 m/sarrow_forward(4) (i) Light shining on a metal surface produces photoelectrons with a maximum kinetic energy of 2.0 eV. The light intensity is then doubled. Now what is the maximum kinetic energy of the photoelectrons, in eV? (ii) The detector in an ordinary digital camera is made of silicon. This detector works by the photoelectric effect. The longest wavelength of light that an ordinary digital camera can detect has a wavelength of 1 micron (where 1 micron = 10^-6 m). What is the work function of silicon, in eV? (iii) Infrared cameras don't use detectors made of silicon. For an infrared camera to detect infrared radiation with a wavelength of 22 microns, its detector must be made of a di erent material. What is the maximum possible work function of this material, in eV?arrow_forward7. (a) What is the energy of an X-ray photons, if it corresponds to a wavelength of 0.005 nm? (b) Find corresponding frequency of X-ray radiation.arrow_forward
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