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 ?
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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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](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fcf571311-f0b3-4b44-967c-ea9a2939c575%2F02db3e3a-24fc-48c2-ada6-f4ff579b25e0%2Fs4llken_processed.jpeg&w=3840&q=75)
Transcribed Image Text: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 ]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fcf571311-f0b3-4b44-967c-ea9a2939c575%2F02db3e3a-24fc-48c2-ada6-f4ff579b25e0%2Fx9kyuxw_processed.jpeg&w=3840&q=75)
Transcribed Image Text: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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