Name: 
 

Quiz Chapter 5



True/False
Indicate whether the sentence or statement is true or false. (1-Point Each)
 

 1. 

Because radio waves are longer than visible light, a radio telescope can use a wire mesh surface.
 

 2. 

Light can behave as a particle or as a wave.
 

 3. 

The Hubble telescope can see in wavelengths that we cannot see on earth because of the absorption of wavelengths from our atmosphere.
 

 4. 

Reflecting UV telescopes do not need to have a finely polished a mirror because the wavelengths are longer than visible light.
 

 5. 

X-rays easily penetrate Earth's atmosphere and reach the ground from space.
 

 6. 

Reflecting telescopes are no longer popular with astronomers because they are expensive and suffer from chromatic aberration.
 

 7. 

The amount of energy a photon carries depends on its wavelength.
 

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question. (3-Points Each)
 

 8. 

Which of the following types of electromagnetic radiation has the lowest energy?
a.
x-rays
b.
visible light
c.
ultraviolet
d.
gamma-rays
e.
infrared radiation
 

 9. 

Blue light
a.
has a greater energy than red light.
b.
has a greater energy than ultraviolet light.
c.
has a lower frequency than red light.
d.
has a longer wavelength than red light.
e.
travels at a greater speed than red light.
 

 10. 

An achromatic lens
a.
is used to correct spherical aberration in reflecting telescopes.
b.
is used to correct chromatic aberration in refracting telescopes.
c.
is used to correct spherical aberration in refracting telescopes.
d.
is used to correct chromatic aberration in reflecting telescopes.
e.
contains two mirrors and focuses the light back through the primary mirror.
 

 11. 

Radio telescopes have poor resolving power because
a.
their diameters are so large.
b.
the energy they receive is not electromagnetic radiation.
c.
radio waves have long wavelengths.
d.
a and b
e.
none of the above
 

 12. 

Astronomers build telescopes on tops of mountains because
a.
there is less air to dim the light.
b.
the seeing is better.
c.
CCDs work better when there is less oxygen in the air.
d.
all of the above
e.
a and b
 

 13. 

A telescope that suffers from chromatic aberration and has a low light gathering power is most likely
a.
a small diameter reflecting telescope.
b.
a small diameter refracting telescope.
c.
a large diameter refracting telescope.
d.
a large diameter reflecting telescope.
e.
an infrared telescope.
 

 14. 

Long wavelength visible light
a.
will have a greater energy than short wavelength visible light.
b.
will have a speed that is faster than short wavelength light.
c.
has a higher frequency than short wavelength visible light.
d.
will appear blue in color to the average human eye.
e.
will appear red in color to the average human eye.
 

 15. 

Ultraviolet radiation from a star
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
 

 16. 

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

I.
Gamma-rays
II.
Ultraviolet light
III.
Infrared radiation
IV.
X-rays
a.
I & II
b.
I & IV
c.
II & III
d.
II, III, & IV
e.
I, II, & IV
 

 17. 

A __________ telescope has an objective that is a lens.
a.
Reflecting
b.
Refracting
c.
Newtonian
d.
Large Diameter
 

 18. 

The __________ of a telescope is a measure of its ability to show fine detail and depends on the diameter of the objective.
a.
light-gathering power
b.
focal length
c.
magnifying power
d.
resolving power
e.
spherical aberration
 

 19. 

Radio telescopes are important in astronomy because
a.
they can detect cool hydrogen.
b.
they have high magnification.
c.
the can detect interstellar dust clouds.
d.
they have no spherical aberration.
e.
they have no chromatic aberration.
 

 20. 

Increasing the diameter of a telescope

I.
increases its light gathering power.
II.
increases its resolving power.
III.
increases it magnifying power.
IV.
increases its chromatic aberration.
a.
I, II, III, & IV
b.
I, II, & III
c.
I, II, & IV
d.
III & IV
e.
I & II
 

 21. 

Which of the following types of electromagnetic radiation has the greatest energy?
a.
x-rays
b.
visible light
c.
radio
d.
gamma-rays
e.
infrared radiation
 

 22. 

__________ has (have) wavelengths that are longer than visible light.
a.
Gamma-rays
b.
Ultraviolet light
c.
Infrared radiation
d.
X-rays
e.
a, b and d above
 

 23. 

Refracting telescopes suffer from __________ aberration.
a.
Low light
b.
Small diameter
c.
Chromatic
d.
Thermal lag
 

 24. 

A __________ is a piece of glass with many small parallel lines etched on its surface to produce a spectrum.
a.
grating
b.
spectrograph
c.
photometer
d.
charge-coupled device
e.
prism
 



 
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