allO Ph 207 exam 1...Subjet: Ph.207Date: 15.03. 2021First semester 2020-2021Department of PhysicsCollage of ScienceBasranTime: Ninty minutese of ScieQ1: A nuclear bomb at the instant of explosion may be approximated to a blackbody of radius1.3 m with a surface temperature of 10’ K. find the bomb emits power ?Q2: An electron has a de Broglie wavelength of 2.5 pm. Find its kinetic energy and the phaseand group velocities of its de Broglie waves.Q2:- Light from the sun arrives at the earth, an average of 1.48 × 10'' m away, at the rateof 1.4 kW/m² of area perpendicular to the direction of the light. Assume that sunlight ismonochromatic with a frequency of 4.95 × 1014 Hz. (a) How many photons fall persecond on each square meter of the earths surface directly facing the sun? (b) What is thepower output of the sun, and how many photons per second does it emit?Q3:- (a) Find the change in wavelength of 85 pm x-rays that are scattered 115° by a target.(b) Find the angle between the directions of the recoil electron and the incident photon. (c)Find the energy of the recoil electron.[ me=9.1x10-31 kg and h= 6.626 × 10-34 m² kg /s ]LecturerDr. Saeed Jabbar Abbas((ersity a Q1: A nuclear bomb at the instant of explosion may be approximated to a blackbody of radius1.3 m with a surface temperature of 107 K. find the bomb emits power ?Q2: An electron has a de Broglie wavelength of 2.5 pm. Find its kinetic energy and the phaseandgroupvelocities of its de Broglie waves.Q2:- Light from the sun arrives at the earth, an average of 1.48 × 10'" m away, at the rateof 1.4 kW/m² of area perpendicular to the direction of the light. Assume that sunlight ismonochromatic with a frequency of 4.95 x 1014 Hz. (a) How many photons fall persecond on each square meter of the earths surface directly facing the sun? (b) What is thepower output of the sun, and how many photons per second does it emit?Q3:- (a) Find the change in wavelength of 85 pm x-rays that are scattered 115° by a target.(b) Find the angle between the directions of the recoil electron and the incident photon. (c)Find the energy of the recoil electron.[ m=9.1x10-31kg and h= 6.626 × 1034 m² kg / s ]

GIven The radius of the spherical bomb is r=1.3 m. The surface temperature of the bomb is T=107 K.…

Answered: Q1: A nuclear bomb at the instant of…

Q1: A nuclear bomb at the instant of explosion may be approximated to a blackbody of radius 1.3 m with a surface temperature of 10' K. find the bomb emits power ?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Wien's displacement law

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Question

all
O Ph 207 exam 1...
Subjet: Ph.207
Date: 15.03. 2021
First semester 2020-2021
Department of Physics
Collage of Science
Basran
Time: Ninty minutes
e of Scie
Q1: A nuclear bomb at the instant of explosion may be approximated to a blackbody of radius
1.3 m with a surface temperature of 10’ K. find the bomb emits power ?
Q2: An electron has a de Broglie wavelength of 2.5 pm. Find its kinetic energy and the phase
and group velocities of its de Broglie waves.
Q2:- Light from the sun arrives at the earth, an average of 1.48 × 10'' m away, at the rate
of 1.4 kW/m² of area perpendicular to the direction of the light. Assume that sunlight is
monochromatic with a frequency of 4.95 × 1014 Hz. (a) How many photons fall per
second on each square meter of the earths surface directly facing the sun? (b) What is the
power output of the sun, and how many photons per second does it emit?
Q3:- (a) Find the change in wavelength of 85 pm x-rays that are scattered 115° by a target.
(b) Find the angle between the directions of the recoil electron and the incident photon. (c)
Find the energy of the recoil electron.
[ me=9.1x10-31 kg and h= 6.626 × 10-34 m² kg /s ]
Lecturer
Dr. Saeed Jabbar Abbas
((
ersity a

Q1: A nuclear bomb at the instant of explosion may be approximated to a blackbody of radius
1.3 m with a surface temperature of 107 K. find the bomb emits power ?
Q2: An electron has a de Broglie wavelength of 2.5 pm. Find its kinetic energy and the phase
and
group
velocities of its de Broglie waves.
Q2:- Light from the sun arrives at the earth, an average of 1.48 × 10'" m away, at the rate
of 1.4 kW/m² of area perpendicular to the direction of the light. Assume that sunlight is
monochromatic with a frequency of 4.95 x 1014 Hz. (a) How many photons fall per
second on each square meter of the earths surface directly facing the sun? (b) What is the
power output of the sun, and how many photons per second does it emit?
Q3:- (a) Find the change in wavelength of 85 pm x-rays that are scattered 115° by a target.
(b) Find the angle between the directions of the recoil electron and the incident photon. (c)
Find the energy of the recoil electron.
[ m=9.1x10-31
kg and h= 6.626 × 1034 m² kg / s ]

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Q1: A nuclear bomb at the instant of explosion may be approximated to a blackbody of radius 1.3 m with a surface temperature of 107 K. find the bomb emits power