What is the energy of a photon whose momentum is the same as a
proton with...
What is the energy of a photon whose momentum is the same as a
proton with the proton’s Kinetic energy being 100 MeV? What is the
velocity of the proton? If it enters a magnetic field of 2T what is
the radius of curvature of its path?
1. What is the momentum (p) of a 960-MeV proton
(that is, its kinetic energy is 960 MeVMeV )?
Express your answer with the appropriate units.
2. An electron (mmm = 9.11×10−31 kg
) is accelerated from rest to speed vv by a conservative force. In
this process, its potential energy decreases by
6.70×10−14 JJ . Determine the electron's speed, v. (in
term of c.)
A. Determine the wavelength of a photon (in nm) whose
energy per photon is 2.73 x 10-19
J.
B. Consider the reaction equation for combustion of
C6H8O2. What is the sum of the
coefficients for the products?
C. Calculate the energy (kJ/mol) of photons of
wavelength 615 nm.
D. Determine the energy of a photon (in Joules) whose
frequency is 6.181 x 1015 Hz.
Consider a head-on, elastic collision between a massless photon
(momentum po and energy Eo ) and a stationary
free electron.
a) Assuming that the photon bounces directly back with momentum
p (in the direction of po ) and energy E, use
conservation of energy and momentum to find p.
b) Verify that your answer agrees with that given by Compton's
formula with theta = pi.
Photon Momentum and Radiation Pressure.
We have seen that photons carry not only energy but also
momentum, with each photon of wavelength λ carrying momentum pγ =
Eγ/c = h/λ. This means that photon interactions can transfer
momentum, and thus radiation exerts forces.
(a) Consider a flux F of photons all moving in the same
direction. If the light lands perpendicular (i.e., directly) on a
surface of area A, find an expression for the rate of energy flow
onto the...
1. What is the momentum of a photon of light that has a
frequency of 2.9 x 10^14 Hz?
a) 1.5 x 10^-28 kg m/s
b) 2.1 x 10^-28 kg m/s
c) 4.4 x 10^-28 kg m/s
d) 6.3 x 10^-28 kg m/s
e) 6.2 x 10^-28 kg m/s
ANSWER E
2. What is the momentum of a photon of light that has a
wavelength of 480nm?
a) 1.1 x 10^-27 kg m/s
b) 2.2 x 10^-27 kg m/s
c)...
1.When the mass of an object is the same, is the total momentum and kinetic energy preserved? The reason is that?
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2. When the mass of the object is different, is the total momentum and kinetic energy preserved? The reason is that?
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3. When two objects collide, is the amount of impact received by the two objects the same? The reason is that?