# Do You Know Astronomy? Play This Quiz

54 Questions | Total Attempts: 931  Settings  Chapter four and five of the astronomy book we are using covers a lot of information that needs to be remembered before the midterms and the quiz below will help you understand the concepts a little better. Give it a shot to refresh your memory and share it with classmates.

• 1.
______________ has (have) wavelengths that are longer than visible light.
• A.

Gamma Rays

• B.

Ultraviolet Light

• C.

• D.

X Rays

• E.

A, B, and D above.

• 2.
Star C and star D are equally luminous. Star C is twice as far away from Earth as star D. How do the brightness level of stars C and D compare?
• A.

Star D appears twice as bright as star C

• B.

Star C appears twice as bright as star D

• C.

Star C appears four times as bright as star D

• D.

Star D appears four times as bright as star C

• 3.
You research the star Sirius and find that its spectral lines are blue shifted. What does this tell you about Sirius?
• A.

It has a transverse velocity that is toward us.

• B.

Its surface temperature is higher than that of the Sun.

• C.

It has a radial velocity that is toward us.

• D.

It has a radial velocity that is away from us.

• E.

It has a transverse velocity that is away from us.

• 4.
The wavelength of maximum intensity that is emitted by a black body is
• A.

Proportional to temperature

• B.

Inversely proportional to temperature

• C.

Proportional to temperature to the fourth power

• D.

Inversely proportional to temperature to the fourth power

• E.

Both a and c above

• 5.
Of the following, which color represents the lowest surface temperature star?
• A.

Yellow

• B.

Blue

• C.

Orange

• D.

Red

• E.

White

• 6.
Ultraviolet radiation is hard to observe primarily because
• A.

The Earth's atmosphere easily absorbs it at the upper atmosphere

• B.

Very few objects emit at ultraviolet wavelengths

• C.

No space-based telescopes operate at ultraviolet wavelengths

• D.

Only the lowest mass stars emit ultraviolet light

• 7.
The ________________ of a telescope is a measure of its ability to show fine detail and depends on the diameter of the objective.
• A.

Spherical Aberration

• B.

Focal Length

• C.

Resolving Power

• D.

Magnifying Power

• E.

Light-Gathering Power

• 8.
Radio telescopes are often connected together to do interferometry. What is the primary problem overcome by radio interferometry?
• A.

Poor light gathering power.

• B.

Poor resolving power.

• C.

Poor magnifying power.

• D.

Interference from nearby sources of radio waves.

• E.

The low energy of radio photons.

• 9.
The Arecibo Observatory is:
• A.

• B.

• C.

An X-ray observatory

• D.

A large optical observatory

• 10.
What is the name of the effect when an electromagnetic wave is bent as it passes from one material into another?
• A.

Defraction

• B.

Refraction

• C.

Red Shift

• D.

Reflection

• 11.
The entire electromagmetic spectrum can be divided into the seven bands of Radio, Microwave, Infrared, Visivle, Ultraviolet, X-ray, and Gamma-ray (from longest to shortest wavelength). To which of these two bands is Earth's atmosphere the most transparent?
• A.

Visible and Ultraviolet

• B.

• C.

• D.

Ultraviolet & Infrared

• E.

X-ray & Gamma-ray

• 12.
Which electron energy level transition corresponds to a hydrogen atom absorbing a visible-light photon that has a wavelength of 656 nanometers?
• A.

The electron makes the transition from energy level 3 to energy level 2.

• B.

The electron makes the transition from energy level 2 to energy level 3.

• C.

The electron makes the transition from energy level 2 to energy level 1.

• D.

The electron makes the transition from energy level 1 to energy level 2.

• E.

The electron makes the transition from energy level 3 to energy level 4.

• 13.
The reason to prefer a reflecting over a refracting telescope is its
• A.

Lack of chromatic aberration

• B.

Shorter length for the same aperture size

• C.

Lighter weight for larger apertures

• D.

All of the above are valid reasons

• 14.
Particle accelerators that smash atoms or particles together at high speeds, such as Fermilab or CERN, are important tools used for simulating conditions in
• A.

The solar wind

• B.

Planetary nebula

• C.

The early universe

• D.

Brown dwarf stars

• 15.
The lowest energy level in an atom is
• A.

The absolute zero temperature.

• B.

The ground state.

• C.

The ionization level.

• D.

Responsible for Doppler shifts.

• E.

The energy level from which the Paschen Series of hydrogen originates.

• 16.
• A.

Will not penetrate Earth's atmosphere and reach the ground.

• B.

Has a wavelength that is longer than the visible light emitted by the star.

• C.

Has a wavelength that is shorter than the X-rays emitted by the star.

• D.

A and b

• E.

B and c

• 17.
What is the wavelength of the longest wavelength light visible to the human eye?
• A.

400 nm

• B.

7000 nm

• C.

3x108 m

• D.

700 nm

• 18.
If light from a star passes from an excited low density gas seen against the dark background of space to your telescope and spectroscope, __________ spectrum results.
• A.

A bright (emission) line

• B.

Continuous

• 19.
The most massive part of the atom is (are) the ___________which has (have) a ___________charge
• A.

Electrons, negative

• B.

Nucleus, negative

• C.

Nucleus, positive

• D.

Electrons, positive

• 20.
A plot of the continuous spectra of five different stars is shown in the figure below. Based on these spectra, which of the stars is the hottest?
• A.

Star D

• B.

Star C

• C.

Star E

• D.

Star A

• 21.
If continuous spectrum light from a star passes through a cool low density gas on its way to your telescope and spectroscope, _____________ spectrum on the continous spectrum results.
• A.

A dark (absorption) line

• B.

A bright (emission) line

• C.

Continuous

• 22.
The visible part of the electromagnetic spectrum can be divided into six color bands of Red, Orange, Yellow, Green, Blue and Violet (from long to short wavelength). A single photon of which of these colors has the greatest amount of energy?
• A.

Green

• B.

Violet

• C.

Red

• D.

Blue

• E.

Orange

• 23.
The fact that the speed of light is constant (as it travels through a vacuum) means that
• A.

Photons with longer wavelengths have lower frequencies

• B.

Radio wave photons have shorter wavelengths than gamma ray photons

• C.

X-rays can be transmitted through the atmosphere around the world

• D.

All of the above are true

• 24.
The number of ___________ in the nucleus determines what element the nucleus is.
• A.

Protons

• B.

All of these determines the element

• C.

Electrons

• D.

None of these determines the element

• E.

Neutrons

• 25.
The emission and absorption lines of a given atom occur at the exact same energies.
• A.

True

• B.

False

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