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Daily Concept Quiz
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1

In the photoelectric effect, as the light striking the metal gets brighter
A)the electrons being emitted have more kinetic energy.
B)more electrons are emitted.
C)the time needed to begin emitting electrons gets smaller.
2

Which has the most energy?
A)A radio wave photon
B)A microwave photon
C)A photon of red light
D)A photon of blue light
3

If the energy of the photons of light striking a metal are less than the energy needed to pull the electrons from the surface of a metal,
A)it takes longer for the electrons to begin leaving the surface.
B)the energy of the emitted electrons are smaller.
C)no electrons can be emitted.
D)electrons are more easily emitted.
4

Which statement is true?
A)Light always behaves like a wave and electrons always behave like particles.
B)Light always behaves like a particle and electrons always behave like waves.
C)Both light and electrons behave sometimes like waves and sometimes like particles.
D)Light and electrons never behave like waves or particles.
5

The de Broglie wavelength of a softball
A)is too small to produce measurable effects in our everyday experiences.
B)is too large to produce measurable effects in our everyday experiences.
C)explains the observed diffraction of softballs in our everyday experiences.
6

In order to have a microscope that can resolve an object that is about 1 micron across (1x10-6 m), it is necessary to have
A)waves with wavelengths larger than the object, such as electromagnetic microwaves.
B)waves with wavelengths smaller than the object, such as the matter waves of electrons.
C)very intense visible light.
7

Suppose an electron in an atom makes a transition from one energy level to another, producing yellow light. If the electron were to make a transition from the same original energy level to an even lower final energy level, which of the following colors might be produced?
A)Red
B)Blue
C)All the visible colors could be produced
8

Absorption line patterns are produced when
A)electrons in an atom make transitions from higher to lower energy levels.
B)electrons in an atom make transitions from lower to higher energy levels.
C)protons in an atom make transitions from higher to lower energy levels.
D)protons in an atom make transitions from lower to higher energy levels.
9

Light from a laser is
A)red.
B)created from a very bright bulb.
C)produced so that it has a half-wavelength.
D)emitted with a single frequency.
10

In quantum theory, when we say that electrons and other very small particles have wavelike properties, the waves that describe them are
A)light waves.
B)electromagnetic waves.
C)probability waves.
D)longitudinal waves.
11

Electrons in atoms naturally tend to transition from higher energy levels to lower energy levels. What prevents all the electrons in an atom from falling all the way into the ground state?
A)The Pauli Exclusion Principle
B)The Heisenberg Uncertainty Principle
C)Conservation of Energy
D)Conservation of Angular Momentum





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