astronomy test 1: hw problems

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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


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