Answers are at the end.


1) Which of these is not a form of electromagnetic radiation?

A) television signals

B) ultraviolet causing a suntan

C) light from your camp fire

D) DC current from your car battery

E) x-rays in the doctor's office


2) The speed of light in a vacuum is written as:

A) h = E/c.

B) v = 186,000 miles per hour.

C) v = 768 km/hour.

D) c = 300,000 km/sec.

E) not given


3) The radiation our eyes are most sensitive to lies in the color:

A) blue at 4,321 nanometers.

B) yellow-green at about 550 nm.

C) red at 6563 Angstroms.

D) black at 227 nm.

E) violet at 7,000 Angstroms.


4) The tendency of a medium to block transmission of a certain wavelength of radiation is referred to as its:

A) seeing.

B) opacity.

C) clarity.

D) transparency.

E) albedo.


5) Off the main sequence, Deneb is a luminous hot supergiant, so it is class:

A) M3V.

B) A2Ia.

C) B9V.

D) M3Ib.

E) K5V.


6) Which of these pairs of binaries would appear most similar in color telescopically?

A) F0V and G9III

B) M1V and K9V

C) A2Ia and F7Ia

D) O2V and M4Ia

E) F3IV and G8III


7) Which temperature will freeze water?

1:   65° F                      2:   5° C                       3:   263 K                   



8) Which feels hotter?

1:  300° F                     2:  300° C                    3:  300° K       


9) The relationship that the total energy radiated by a black body is proportional to T4 is attributed to?

1: Bunsen

2: Wien

3: Kirchhoff

4: Stefan


10) What kind of spectrum do we see from the sun?

A) a continuum with no lines, as shown by the rainbow

B) a continuum with emission lines

C) only absorption lines on a black background

D) a continuum with absorption lines

E) only emission lines on a black background


11) Which property of a black body is NOT true?

A) It appears black to us, regardless of its temperature

B) Its energy is in a continuum.

C) Its energy peaks at the wavelength determined by its temperature.

D) If its temperature is doubled, the peak in its curve would be halved in wavelength.

E) If its temperature doubled, it would give off 16 times more total energy.


12) A pulsating variable star has a temperature ranging from 4000 K to 8000 K.  When it is hottest, each cm2 of surface radiates how much more energy?

A) (sqrt2)x more

B) 2x more

C) 4x more

D) 16x more


13) The element first found in the Sun’s spectrum and then on Earth 30 years later is… 

A) hydrogen

B) helium

C) solarium

D) technicum


14) A source of light is approaching us at 3,000 km/s.  All its waves are:

A) Red shifted by 1%

B) Blue shifted by 1%

C) Not affected, as c is constant in all reference frames.

D) Red shifted out of the visible into the infrared

E) Blue shifted out of the visible into the ultraviolet


15) The temperature of the photosphere of the Sun is about:

A) 4500 K

B) 5800 K

C) 11000 K

D) 1 million K

E) 15 million K


16 )The Sun’s average density is about the same as:

A) the Earth’s Moon

B) the Earth

C) Haley’s Comet

D) Jupiter

E) Saturn


17) From inside out, which is the correct order?

A) core, convective zone, radiative zone

B) photosphere, radiative zone, corona

C) radiative zone, convective zone, chromosphere

D) core, chromosphere, photosphere

E) convective zone, radiative zone, granulation


18) Typically, a granule in the photosphere of the sun is about the size of?

A) A city, ~20-30 kilometers across.

B) Texas, ~1000 km across.

C) The Moon, ~3000 km across.

D) The Earth, ~12,000 km across.

E) Jupiter, ~100,000 km across.


19) What is the temperature of 150 C in Kelvin?

A) 212 K

B) 433 K

C) 413 K

D) 423 K

E) 522 K


20) A star's absolute magnitude is its apparent brightness as seen from:  

A) Pluto.

B) Alpha Centauri.

C) 10 light years distance.

D) 33 light years distance.

E) 100 parsecs distance.


21) Which is correct

1 :         velocity x frequency = wavelength

2 :         velocity x period = wavelength

3 :         period x frequency = wavelength

4 :         velocity / period = wavelength


22) A star of temperature 3,750K, just one step hotter than M (at 3,500), would be a related:

A) A9.

B) F5.

C) K9.

D) M1.

E) O3.


23) A star emits the most energy at a wavelength of 5.8x10-5cm.  What is its temperature?

A) 5800 K.

B) 2000 K.

C) 20000 K

D) 0.29 K.

E) 5000 K.


24) What energy transport gets the energy of the gamma rays to the Sun’s surface?

A) the transition zone

B) meson capture

C) the weak force

D) convection

E) prominences


25) The model of the atom with quantum leaps between electron orbitals is that of:

A) Albert Einstein.

B) Isaac Newton.

C) Neils Bohr.

D) Scott Bachula.

E) Wilhelm Kirchhoff.


26) That electromagnetic radiation can behave not only as a wave, but as a packet of energy, or a photon, is due to:

A) Enrico Fermi.

B) Edward Teller.

C) Neils Bohr.

D) Isaac Newton.

E) Albert Einstein.


27) The magnetic fields of sunspots are studied by the splitting of their spectral lines in the:

A) Doppler effect.

B) Stefan's law.

C) Zeeman effect.

D) Kirchhoffts third law.

E) Bohr model.


28) When we glimpse the chromosphere at the start and end of totality, its color is:

A) yellow, like the photosphere below it.

B) red, due to ionized hydrogen at lower pressure.

C) green (the famous flash).

D) blue, due to the ionization of nitrogen by the magnetic fields.

E) white from the moonlight.


29) The solar winds blow outward from:

A) the Sun's poles only.

B) flares.

C) the entire photosphere.

D) coronal holes.

E) sunspots.


30) In the proton-proton cycle, the positron is:

A) an anti-electron.

B) the chief means energy reaches the photosphere.

C) a spin conservation particle.

D) massless.

E) intermediate between the proton and neutron in mass.


31) The most striking example of solar variability was the:

A) Dust Bowl drought of the 1930s.

B) Sporer Minimum that doomed the Anasazi.

C) Joseph's seven lean years in the Old Testament.

D) Maunder Minimum from 1645-1715.

E) the fall of Rome.


32) The ESA satellite which gave us our best parallax measurements is:

A) Huygens.

B) Cassini.

C) Giotto.

D) Hipparcos.

E) Copernicus.



Key:     D D B B B     B C B D D     A D B B B    D C B D D     B C E D C     E C B D A     D D