astronomy test 1: hw problems
what fraction of the entire electromagnetic spectrum is spanned by visible light
visible light covers roughly 10 percent of the electromagnetic spectrum
if the new moon fell on march 2nd, what is the moons phase on march 14th
waxing gibbous
which of the following types of electromagnetic waves has the shortest wavelength
x-ray
constellations are close clusters of stars all about the same distance from the sun
false
from the South Pole, Polaris would appear directly overhead
false
how long is the precession cycle
26,000 years
what would be the frequency of a photon with a wavelength of 100 m
3,000,000/second
how many arc seconds are in a degree
3600
into how many constellations is the celestial sphere divided
44
observations in the x-ray portion of the spectrum are routinely done from the surface of the earth
false
the full moon rises around sunrise, and sets around sunset
false
from full moon to third quarter moon takes about a week
true
gamma rays are a type of electromagnetic radiation
true
only at the equator are all the stars visible over the course of the year
true
over the course of a night, Polaris moves less than any visible star in the sky
true
which of these is constant for all types of electromagnetic radiation in a vacuum
velocity
night and day have approximately equal length at what time or times of the year
vernal and autumnal equinoxes
which of the following colors has a wavelength shorter than the others
violet
the two forms of electromagnetic radiation that penetrate that atmosphere best are
visible and radio waves
you would perceive a change in a visible light waves amplitude as a change in its color
false
a waves velocity is the product of the
frequency times the wavelength of the wave
where on earth would you be if Polaris were directly overhead
North Pole
where would you be if the sun sets for six continuous months, beginning about September 23rd
North Pole
where on earth can you observe all the stars in the sky over an entire year
equator `
the place where the sun crosses the equator are called the
equinoxes
about how many stars are visible on a clear, dark night with the unaided eye alone
a few thousand
which of the following types of eclipses will never be observed
an annular lunar eclipse
while watching a star, you see it moves 15 degrees across the sky. how long have you been watch it
an hour
the last quarter phase of the moon
crosses the meridian at sunrise
a light year is a unit used for what kind of measurement
distance
the celestial sphere appears to move fastest above the
equator
X-rays travel at a greater speed than radio waves
false
a lunar eclipse can only happen during a
full moon
what are constellations
groups of stars making an apparent pattern in the celestial sphere
when the sun rises it is located in the constellation gemini. when the sun sets later that same day it will be
in the constellation gemini
if a waves frequency doubles, its wavelength
is halved
what conditions are necessary for an annular solar eclipse
new moon on ecliptic at apogee
what is the name of the point on the celestial sphere that all starts seem to circle around, when viewing the sky from North America
north celestial pole
that Polaris will not always be the pole star is due to
precession shifting the celestial pole
of all the forms of electromagnetic radiation, the one with the lowest frequency is
radio waves
the difference between solar time and sidereal time
this diagram explains:
the place the sun stops its northward motion along the ecliptic is the
summer solstice
the constellations of the zodiac fall along
the ecliptic
why aren't there lunar and solar eclipses every month
the moons orbit is inclined 5 degrees to the ecliptic
the angular size of an object depends on which two quantities
the objects actual size and its distance from us
where would you be if the sun passes directly overhead on December 21st
tropic of Capricorn