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Question
The widths of the lines produced by monochromatic light falling on a diffraction grating can be reduced by:A) increasing the wavelength of the light
B) increasing the number of rulings without changing their spacing
C) decreasing the spacing between adjacent rulings without changing the number of rulings
D) decreasing both the wavelength and the spacing between rulings by the same factor
E) increasing the number of rulings and decreasing their spacing so the length of the grating remains the same
Answer
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Related questions
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The intensity of the microwave background radiation, a remnant of the big bang:
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B) is least in directions toward the center of the galaxy
C) is proportional to the reciprocal of the distance from us
D) is proportional to the square of the distance from us
E) is nearly the same in all directions
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A) 105y
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Q:
A baryon is a combination of:
A) three quarks
B) two quarks and an antiquark
C) one quark and two antiquarks
D) one quark and one antiquark
E) two quarks
Q:
Any meson is a combination of:
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B) two quarks and an antiquark
C) one quark and two antiquarks
D) one quark and one antiquark
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Q:
Quarks are the constituents of:
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E) only mesons
Q:
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Q:
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B) electromagnetic and strong
C) electromagnetic and weak
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Q:
Strangeness is conserved in:
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E) some strong particle decays
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When a kaon decays via the strong interaction the products must include a:
A) baryon
B) lepton
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Q:
Two baryons interact to produce pions only, the original baryons disappearing. One of the baryons must have been:
A) a proton
B) an omega minus
C) a sigma
D) an antiparticle
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Q:
A neutral lepton cannot decay into two neutrinos. Of the following conservation laws, which would be violated if it did?
A) Energy
B) Baryon number
C) Linear Momentum
D) Angular momentum
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Q:
An electron participates in:
A) the electromagnetic and weak forces only
B) the strong and weak forces only
C) the electromagnetic and gravitational forces only
D) the electromagnetic, gravitational, and weak forces only
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Q:
An example of a fermion is a:
A) photon
B) pion
C) neutrino
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Q:
A particle with spin angular momentum is called a:A) leptonB) hadronC) fermionD) bosonE) electron
Q:
The microwave background radiation is a result of the big bang. The big bang also resulted in a uniform distribution of background:
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C) gluons
D) neutrinos
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Q:
Compared to fusion in a tokamak, laser fusion makes use of:
A) smaller particle number densities
B) greater particle number densities
C) longer confinement times
D) higher temperatures
E) lower temperatures
Q:
For a controlled nuclear fusion reaction, one needs:
A) high number density nand high temperature T
B) high number density nand low temperatureT
C) low number density nand high temperature T
D) low number density nand low temperature T
E) high number density nand temperature T = 0 K
Q:
The first step of the proton-proton cycle is:
Q:
Nuclear fusion in the Sun is increasing its supply of:
A) hydrogen
B) helium
C) nucleons
D) positrons
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Q:
The purpose of a moderator in a nuclear reactor is to:
A) provide neutrons for the fission process
B) slow down fast neutrons to increase the probability of capture by uranium
C) absorb dangerous gamma radiation
D) shield the reactor operator from dangerous radiation
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Q:
In the normal operation of a nuclear reactor:
A) control rods are adjusted so the reactor is subcritical
B) control rods are adjusted so the reactor is critical
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The energy supplied by a thermal neutron in a fission event is essentially its:
A) excitation energy
B) binding energy
C) kinetic energy
D) rest energy
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When 236U fissions the fragments are:
A) always 140Xe and94Sr
B) always identical
C) never 140Xe and 94Sr
D) never identical
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Q:
A certain nucleus, after absorbing a neutron, emits a and then splits into two alpha particles. The (A, Z) of the original nucleus must have been:A) 6, 2B) 6, 3C) 7, 2D) 7, 3E) 8, 4
Q:
Radioactive polonium, 214Po (Z= 84), decays by alpha emission to:
A) 214Po (Z= 84)
B) 210Pb (Z= 82)
C) 214At (Z= 85)
D) 218Po (Z= 84)
E) 210Bi (Z= 83)
Q:
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Q:
Bombardment of 28Si (Z= 14) with alpha particles may produce:
A) a proton and 31P (Z= 15)
B) hydrogen and 32S (Z= 16)
C) a deuteron and 27Al (Z= 13)
D) helium and 31P (Z= 15)
E) 35Cl (Z= 17)