A stellar object is emitting radiation at 1620 nm. A detector is capturing 9 107 photons...
A stellar object is emitting radiation at 1620 nm. A detector is
capturing 9 107 photons per second at this wavelength. h = 6.63 x
10-34 J-s. c = 2.998 x 108 m/s.
(a) What is the total energy of the photons detected in one
second?
J/s
(b) What is the total energy of the photons detected in one
hour?
J/hr
Homework Answers
(a): energy of one photon = h* c / λ
In one second 9* 107 photons are emited.
So the energy on 9107 photons will be = 9* 107* h* c / λ
= 9* 107* 6.63 x 10-34* 2.998 x 108 / (1620* 10-9)
= 1.1036* 10-11 J/Sec
(b): in 1 hour the total energy emitted = 3600* energy emitted in one second
= 3600* 1.1036* 10-11
= 3.9729* 10-8 J
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A stellar object is emitting radiation at 1620 nm. A detector is
capturing 9 107 photons...
A stellar object is emitting radiation at 1720 nm. A detector is capturing 9 107 photons...
A stellar object is emitting radiation at 1720 nm. A detector is capturing 9 107 photons per second at this wavelength. h = 6.63 x 10-34 J-s. c = 2.998 x 108 m/s. (a) What is the total energy of the photons detected in one second? _______J/s (b) What is the total energy of the photons detected in one hour? _____J/hr
A stellar object is emitting radiation at 1720 nm. A detector is capturing 8 107 photons...
A stellar object is emitting radiation at 1720 nm. A detector is
capturing 8 107 photons per second at this
wavelength. h = 6.63 x 10-34 J-s. c = 2.998 x
108 m/s.
(a) What is the total energy of the photons detected in one
second?
J/s
(b) What is the total energy of the photons detected in one
hour?
J/hr
A stellar object is emitting radiation at 1070 nm. A detector is capturing 8 107 photons...
A stellar object is emitting radiation at 1070 nm. A detector is
capturing 8 107 photons per second at this
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108 m/s.
(a) What is the total energy of the photons detected in one second?
J/s
(b) What is the total energy of the photons detected in one
hour? J/hr
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Need all answers
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What is the energy in joules of a mole of photons associated with visible light of wavelength 486 nm? (c = 3.00 x 10 m/s; h = 6.63 x 10-34 J·s; NA = 6.022 x 1023 moles) Select one: a. 6.46 x 10-16 J b. 6.46 x 10-25 c. 2.46 x 10-4 J Od. 12.4 kJ O e. 246 kJ
A stellar object is emitting radiation at 1720 nm. A detector is
capturing 8 107 photons per second at this
wavelength. h = 6.63 x 10-34 J-s. c = 2.998 x
108 m/s.
(a) What is the total energy of the photons detected in one
second?
J/s
(b) What is the total energy of the photons detected in one
hour?
J/hr
A stellar object is emitting radiation at 1070 nm. A detector is
capturing 8 107 photons per second at this
wavelength. h = 6.63 x 10-34 J-s. c = 2.998 x
108 m/s.
(a) What is the total energy of the photons detected in one second?
J/s
(b) What is the total energy of the photons detected in one
hour? J/hr
A stellar object is emitting radiation at 3.55 mm. what type of electromagnetic spectrum is this radiation? If a detector is capturing 3.2 X 10^8 photons per second at this wavelength, what is the total energy of the photons detected in one hour?
5). Estimate the number of photons emitted in one second from a LED lamp of 10 Watts, if the band-gap energy of the LED is 1.5 eV and 100% energy conversion from electricity to light energy 1 eV = 1.6 x 10-19 Joule. Planck constant h=6.63 x 10-34 Js. Speed of light = 2.998 x 108 msł.
Need all answers
19. Calculate the wavelength, in nm, of an electromagnetic radiation with a frequency 835.6 MHz (common frequeney used for cell phone communication). (c 3.0 x 10* m/s, h-6.6262 x 103 J.s). 1Pt.) 20. A laser pulse with wavelength 532 nm contains 4.67 mJ of energy. How many photons are in the laser pulse? (c 3.0 x 108 m/s, h 6.6262 x 103* J.s). Ans.: 21. An electron in the n 7 level of the hydrogen atom relaxes...
What is the energy in joules of a mole of photons associated with visible light of wavelength 486 nm? (c = 3.00 x 10 m/s; h = 6.63 x 10-34 J·s; NA = 6.022 x 1023 moles) Select one: a. 6.46 x 10-16 J b. 6.46 x 10-25 c. 2.46 x 10-4 J Od. 12.4 kJ O e. 246 kJ
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