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WorksheetsTelescopes
Total questions: 20
Worksheet time: 20mins
Name
Class
Date
1.
Who invented the telescope?
a)
Galileo
b)
Plato
c)
Ptolemy
d)
it's unknown
2.
What was Galileo's contribution to the telescope?
a)
He invented it
b)
He patented it
c)
He discovered it
d)
He promoted it
3.
This instrument can be thought of as a large light bucket
a)
your eyes
b)
a lens
c)
a telescope
d)
a satellite dish
4.
The "collector", or "light-gathering part" of the telescope is called the _____
a)
objective
b)
ocular
c)
eye piece
d)
refractor
5.
If the collector is made 10 times wider, how much more light is collected?
a)
2 times more
b)
10 times more
c)
20 times more
d)
100 times more
6.
When light passes through a lens, it _____
a)
reflects
b)
is absorbed
c)
bounces
d)
changes direction
7.
The bending of light through a lens is called _____
a)
reflection
b)
refraction
c)
diffraction
d)
absorption
8.
When the light comes to a focus, using a refracting telescope, it is _____
a)
upside-down, and flipped left and right
b)
only flipped left and right
c)
only upside-down
d)
unchanged
9.
The image, observed in a telescope, is _____
a)
bigger than the object
b)
the same size as the object
c)
slightly smaller than the object
d)
much smaller than the object
10.
The ability to separate two objects that are very close together, is called the _____
a)
orientation
b)
attitude
c)
magnification
d)
resolution
11.
In general the bigger the telescope's objective the better your _____
a)
resolution
b)
magnification
c)
attitude
d)
orientation
12.
Telescopes that use mirrors are called _____
a)
refractors
b)
reflectors
c)
catadioptric
d)
resolving
13.
Who was the first to develop reflecting telescopes?
a)
Nicolaus Copernicus
b)
Isaac Newton
c)
Galileo Galilei
d)
Tycho Brahe
14.
What do modern professional-grade optical telescopes use as their objective?
a)
lenses
b)
mirrors
c)
electronic detectors
d)
photographic film
15.
According to Phil, "the problem with astronomers" is getting them to _____
a)
show you their telescope
b)
talk about astronomy
c)
stop talking about astronomy
d)
host a star party
16.
Who discovered infrared light, a kind of light invisible to our eyes?
a)
Robert Hooke
b)
Isaac Newton
c)
Galileo Galilei
d)
William Herschel
17.
What kind of detector is used for radio waves?
a)
a refracting telescope
b)
a metal dish
c)
a reflecting telescope
d)
a digital camera
18.
Our eyes act like movie cameras, taking pictures at a frame rate of about _____
a)
1.4 images per second
b)
14 images per second
c)
140 images per second
d)
1,400 images per second
19.
Photographs allow us to see fainter objects by taking long _____
a)
wavelength
b)
exposures
c)
body tubes
d)
frame rates
20.
Which detectors are dozens of times more light-sensitive than film?
a)
your eyes
b)
digital detectors
c)
computers
d)
mirrors
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