How do the dark lines of an atom’s absorption spectrum relate to the bright lines of its emission spectrum?

The bright lines are at the same energies as the dark lines.

What will experiments with ever larger particle accelerators tell us?

what conditions were like in the early universe closer to the big bang

How does gamma emission affect the atomic number of an isotope?

It does not change the atomic number.

Which choice represents the greatest energy transition from a higher energy level to a lower one?

emission of a blue photon of 450 nm

Which technique is a paleontologist using to measure the ratio of carbon-14 to carbon-12 in a fossil?

using radioactive decay to date the skull

Which statement could Einstein’s theory on the photoelectric effect explain that the wave theory could not?

The kinetic E of photoelectrons was not related to the intensity of light

Which phrase is explained by general relativity?

how massive stellar objects can form a lens

Which statement is a postulate of general relativity?

Observers see same laws of physics in any frame of motion

What is the composition of a neutron?

one up quark and two down quarks

Which phrase accounts for the emission spectra of elements?

electrons moving from high energy levels to low energy levels

studbud

Unit 6 PhysicsU Modern Physics

19 termsStudBud Administration30 plays

Imported from external platform

Flashcards19 cardsFPractice quizPHost liveL

Questions 19

Answers

1
Which process is used by NASA to make electric power on deep space probes?
X-ray bombardment
fission
radioactive decay
fusion
2
Which branch of physics best explains the photoelectric effect?
law of conservation of momentum
general relativity
thermodynamics
nature of light
3
How do the dark lines of an atom’s absorption spectrum relate to the bright lines of its emission spectrum?
The dark lines are at higher energies than the bright lines.
The bright lines are at the same energies as the dark lines.
You cannot relate the two types of spectra.
The bright lines are at higher energies than the dark lines.
4
What will experiments with ever larger particle accelerators tell us?
what happens when matter and antimatter collide
what conditions were like in the early universe before the big bang
what the fate of the universe will be
what conditions were like in the early universe closer to the big bang
5
How does gamma emission affect the atomic number of an isotope?
It decreases the atomic number.
It increases the atomic number.
It does not change the atomic number.
You cannot tell from the information given.
6
Which choice represents the greatest energy transition from a higher energy level to a lower one?
emission of a yellow photon of 590 nm
emission of a green photon of 550 nm
emission of a blue photon of 450 nm
emission of a red photon of 770 nm
7
Which technique is a paleontologist using to measure the ratio of carbon-14 to carbon-12 in a fossil?
using gamma emissions to date the skull
using radioactive decay to date the skull
using radioactive decay to determine the structure of the skull
using alpha emission to determine the structure of the skull
8
Which answer choice argues for the particle nature of light?
diffraction
Doppler effect
photoelectric effect
interference
9
Which statement could Einstein’s theory on the photoelectric effect explain that the wave theory could not?
Electrons ejected by incoming light
Increased light intensity results number of electrons ejected increased
The kinetic E of photoelectrons was not related to the intensity of light
Light intensity decreased, then the number of ejected electrons decreased
10
Which phrase is explained by general relativity?
why moving muons decay more slowly than stationary ones
why atomic clocks tick more slowly when in motion
why no object can move faster than light through space-time
how massive stellar objects can form a lens
11
Which statement is a postulate of general relativity?
Observers see same laws of physics in any frame of motion
Observers see same laws of physics whether at rest or in uniform motion
The speed of light is constant for all observers
A g field is the same as an object moving at the speed of light
12
Which type of spectrum would you expect to find from a gas cloud heated by a dying star?
emission spectrum
absorption spectrum
high-frequency spectrum
continuous spectrum
13
Which term is the prominent nuclear process within stars?
alpha emission
beta emission
fusion
fission
14
Which device depends on the photoelectric effect?
computer
speakers
MP3 player
digital camera
15
What is the composition of a neutron?
two up quarks and one down quark
three down quarks
one up quark and two down quarks
three up quarks
16
Which phrase accounts for the emission spectra of elements?
electrons moving in opposite directions around the nucleus
electrons spinning around the nucleus within orbits
electrons moving from high energy levels to low energy levels
electrons moving from low energy levels to high energy levels
17
During a nuclear reaction, 0.01000 kg of uranium when to 0.00950 kg. How much energy was released?
1.50×10^5 J
5.00×10^-14 J
9.00×10^16 J
4.50×10^13 J
18
Which particles hold the nucleus together by attractive forces they exert on one another?
protons
neutrons
positrons
quarks
19
An electron is an example of which term?
boson
antiparticle
lepton
hadron

Unit 6 PhysicsU Modern Physics Flashcards | StudBud