Exam 6: Atoms and Spectra

The wavelength of the hydrogen line from level 1 to level 2 in a hot star is ____________ the wavelength of the same line in a cool star. The stars have the same radial velocities away from Earth.

If a light-emitting object is moving away from you, you observe its wavelengths to be ________ its wavelengths if it were at rest.

An atom can be ionized by ____ it.

-Diagram 6-2 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

The Hγ line has a wavelength of 434.0 nm when observed in the laboratory. If the Hγ line appears in a stars spectrum at 434.5 nm, what is the radial velocity of the star

The ____________________ of a star can be determined from its color.

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

Which of the following is not a fundamental component of the atom

Where are neutrons found in the hydrogen atom

____________________ is a measure of the amount of energy due to the motion of the particles in a gas, liquid, or solid.

What is a blackbody

The bluer the light, the ____ each photon contains.

An atom gained an electron. Therefore, it has been ionized.

The peak wavelength in the continuous emission spectrum of a body is inversely proportional to its ____________________.

-In the above model of an atom, where is the neutron located, assuming a neutron is present

If one star has a temperature of 4000 K and another star has a temperature of 40,000 K, how much more energy per second will the hotter star radiate from each square meter of its surface ____________________

Which of the following can be determined by using the Doppler effect I.the speed at which a star is moving away from an observer II)the transverse velocity of a star III)the radial velocity of a star IV)the speed at which a car is traveling toward an observer

The process of making an electron less tightly bound to an atom's nucleus is known as

The longer the wavelength, the bluer and brighter the star appears.

The temperature of an object from which no heat energy can be extracted is