Astronomy Assignment 4

Front 1

As a star's temperature increases, the frequency of peak emission also increases:

Back 1

True

Front 2

If a star was teh same size as our sun, but produced 81 times more energy, it must be:

Back 2

3 times hotter than our sun.

Temperature is the 4th root of the energy

Front 3

The sommon element discovered in the Sun's spectrum before it was found here is:

Back 3

Helium

Front 4

A dense, hot body will give off an __________ spectrum:

Back 4

Continuous

Front 5

The most energetic photons are:

Back 5

Gama rays

Front 6

A jar filled with gas is placed directly in front of a second jar filled with gas. Using a spectroscope to look at one jar through the other you observe dark spectral lines. The jar closest to the spectroscope contains:

Back 6

The cooler gas

Front 7

The sun's observed spectrum is:

Back 7

a continuum with absorption lines

Front 8

In general, the spectral lines of molecules are:

Back 8

More complex than those of atoms

Front 9

The total energy radiated by a blackbody depends on:

Back 9

the 4th power of its temperature

Front 10

In Bohr's model of the atome, electrons:

Back 10

only make transitions between orbits of specific energies

Front 11

The spectral line of each element are distinctive to that element, whether we are looking at emission or absorption lines:

Back 11

true

Front 12

The shorter a wave's wavelength, the greater its energy

Back 12

True

Front 13

Which of these is emitted when an electron falls from a higher to lower orbital?

Back 13

A Photon

Front 14

Electromagnetic radiation

Back 14

Can behave both like a wave and a particle

Front 15

The sun's blackbody curve peaks in the ________ portion of the spectrum

Back 15

Visible