ClassQ Ch05&6

What is the wavelength of the longest wavelength light that can be seen with the human eye?400 nm4000 nm7000 nm700 nm3108 m

____ has (have) wavelengths that are longer than visible light.Gamma-raysUltraviolet lightInfrared radiationX-raysA, B and D above

____ has (have) wavelengths that are shorter than visible light.

I.Gamma-raysII.Ultraviolet lightIII.Infrared radiationIV.X-raysI & III & IVII & IIIII, III, & IVI, II, & IV

300-nm light has a lower frequency than 500-nm light.TrueFalse

Absolute zero iszero degrees Celsius.the temperature at which atoms have no remaining energy from which we can extract heat.the temperature at which water freezes.both A and C.none of the above.

The neutral hydrogen atom consists ofone proton and one neutron.one proton.one proton, one neutron, and one electron.one proton and one electron.an isotope and an ion.

The process of removing an electron from a stable nucleus is known asionization.Doppler broadening.collisional broadening.a red shift.quantum mechanics.

A plot of the continuous spectra of five different stars is shown below. Based on these spectra, which of the stars is the hottest?Star AStar BStar CStar DStar E

A plot of the continuous spectra of five different stars is shown below. Based on these spectra, which of the stars has the lowest temperature?Star AStar BStar CStar DStar E

An atom can be excitedif it emits a photon.if it collides with another atom or electron.if it absorbs a photon.A and B above.B and C above.

A(n) ____ contains two or more atoms that are bound together by exchanging or sharing electrons with each other.nucleusionprotonelectron cloudmolecule

The ____ of a gas is a measure of the average speed of the particles (atoms or molecules) in the gas.heatcompositiontemperatureblue shiftbinding energy

In the diagram below, which of the transitions would absorb a photon with the smallest energy?Transition 1Transition 2Transition 3Transition 4Transition 5

In the diagram below, which of the transitions would absorb a photon with the shortest wavelength?Transition 1Transition 2Transition 3Transition 4Transition 5

In the diagram below, which of the transitions would absorb a photon with the greatest frequency?Transition 1Transition 2Transition 3Transition 4Transition 5

In the diagram below, which of the transitions would absorb a photon with the longest wavelength?Transition 1Transition 2Transition 3Transition 4Transition 5

An atom that is excitedis also ionized.is an isotope.has had its electron moved to the lowest energy level.can emit a photon when the electron moves to a lower energy level.can emit a photon when the electron moves to a higher energy level.

The lowest energy level in an atom isthe absolute zero temperature.the ground state.the ionization level.responsible for Doppler shifts.the energy level from which the Paschen series of hydrogen originates.

The two most abundant elements in the sun arenitrogen and oxygen.hydrogen and helium.sulfur and iron.carbon and hydrogen.carbon and nitrogen.

You are standing near a railroad track and a train is moving toward you at 60 mph and blowing its horn. What will you notice as the train moves past you?As the train approaches, the horn will sound lower in pitch than when the train is moving away.As the train approaches, the horn will sound higher in pitch than when the train is moving away.There will be no change in the pitch of the horn as it moves by.The horn will get louder as the train moves away from you.The horn will get quieter as the train moves toward you.

Which of the following can be determined by using the Doppler Effect?I & IVII & IIIII & IVI & IIII, III, & IV

The speed at which a star is moving away from an observer.The transverse velocity of a star.The radial velocity of a star.The speed at which a car is traveling toward an observer.

The diagram below illustrates a light source, a gas cloud, and three different lines of sight. Along which line of sight would an observer see an absorption spectrum?1232 and 3none of them

The diagram below illustrates a light source, a gas cloud, and three different lines of sight. Along which line of sight would an observer see a continuous spectrum?1232 and 3none of them

The diagram below illustrates a light source, a gas cloud, and three different lines of sight. Along which line of sight would an observer see an emission spectrum?1232 and 3none of them

Why don't we see hydrogen Balmer lines in the spectra of stars with temperatures of 3,200 K?There is no hydrogen in stars this cool.The stars are hot enough that most of the hydrogen is ionized and the atoms cannot absorb energy.These stars are so cool that nearly all of the hydrogen atoms are in the ground state.Stars of this temperature are too cool to produce an absorption spectrum.Stars of this temperature are too hot to produce an absorption spectrum.

Why don't we see hydrogen Balmer lines in the spectra of stars with temperatures of 45,000 K?There is no hydrogen in stars this hot.The stars are hot enough that most of the hydrogen is ionized and the atoms can not absorb energy.These stars are so cool that nearly all of the electrons in the hydrogen atom are in the ground state.Stars of this temperature are too cool to produce an absorption spectrum.Stars of this temperature are too hot to produce an absorption spectrum.

The absorption lines in the visible portion of the spectrum of a star that are produced by hydrogen are from theLyman series.Balmer series.Paschen series.isotopes of hydrogen.ions of hydrogen.

The table below lists the spectral types for each of five stars. Which star in this table would have the lowest surface temperature? For Cet35 Ari Tri Per

The table below lists the spectral types for each of five stars. Which star in this table would have the greatest surface temperature? For Cet35 Ari Tri Per

The ____ is responsible for binding the electrons to the nucleus.Kirchhoff's lawground statetemperatureCoulomb forceBalmer series

____ has a negative charge and a mass about 1800 times smaller than a proton.A neutronAn electronA moleculeA nucleusAn isotope

A neutral atom always containsthe same number of protons as it does neutrons.the same number of electrons as it does neutrons.the same number of protons as it does electrons.twice as many protons as it does neutrons.twice as many neutrons as it does protons.

____ is a set of rules that describes how atoms and subatomic particles behave.Kirchhoff's lawBlack body radiation lawThe Coulomb forceQuantum mechanicsThe binding energy

The temperature of an object from which no heat energy can be extracted is0 F0 C0 K100 K100 C

Atoms that have the same number of protons but a different number of neutrons are calledions.molecules.atomic pairs.nuclear pairs.isotopes.

If you move an electron in an atom from a low energy level to a higher energy level within the atom, we say that the atom isin the ground state.ionized.dissociated.excited.neutralized.

Two stars of the same spectral class must have the sameradius.temperature.mass.distance.all of the above.

One star has a temperature of 30,000 K and another star has a temperature of 6,000 K. Compared to the cooler star, how much more energy per second will the hotter star radiate from each square meter of its surface?5 times25 times8.11017 times625 times1.31015 times

One star has a temperature of 10,000 K and another star has a temperature of 5,000 K. Compared to the cooler star, how much more energy per second will the hotter star radiate from each square meter of its surface?16 times2 times11016 times625 times25 times

Which of the following cannot be determined from the spectrum of a star?chemical compositionsurface temperatureradial (along line of sight) velocitytangential (perpendicular to line of sight) velocityBoth C and D

What is the order of star colors with increasing temperature?Red, Yellow, BlueBlue, Red, YellowRed, Blue, YellowYellow, Red, BlueBlue, Yellow, Red

The energy of a photon is proportional to the light'swavelength.speed.frequency.intensity.two of the above.

The bluer the light, the ____ each photon contains.more energyless energyless speedmore speednone of the above

Each element has its own set of characteristic absorption lines becausethe temperature of each element can vary.elements can exist in different forms of matter.electron energy levels differ for each element.each element has a different mass.absorption lines depend upon the speed of the object.

The Doppler effect states that the motion of any object canshift the wavelength of spectral lines.change the speed of light emitted from the object.enhance the chemical composition of the object.make the object appear hotter.make the object appear cooler.

The nucleus of the hydrogen atom consists of a single neutron.TrueFalse

Blue stars are hotter than red stars.TrueFalse

Isotopes of the same element have the same number of protons.TrueFalse

Hydrogen alpha is the longest wavelength Balmer line.TrueFalse

An absorption spectrum is also called a bright line spectrum.TrueFalse

Stars of spectra type K have strong Balmer lines.TrueFalse

The Doppler effect is sensitive only to motion along the line of sight.TrueFalse

An atom that has lost an electron is called an ion.TrueFalse

The Lyman series lines of hydrogen all lie in the infrared.TrueFalse

Hydrogen lines are weak in the spectra of hot stars because many of the hydrogen atoms are ionized.TrueFalse

The hotter an object, the more blue it appears.TrueFalse

An atom is ionized if one of its electrons jumps to a higher energy level in the atom.TrueFalse