Astro 7N Unit 1 Copper's Quizzes

Compared to blue light, red light has

longer wavelength, smaller frequency, smaller energy

At approximately what time does the third quarter moon rise?

midnight

Approximately two weeks after a Solar Eclipse, what phase will the Moon be in?

Full

Compare the frequency and wavelength of a gamma ray with visible light.

Gamma ray frequency is higher and its wavelength is lower

Which types of radiation have the lowest radiation?

IR and radio

What is the relationship between wavelength and frequency?

If the frequency increases, the wavelength decreases

The electrons in a cloud of hydrogen gas are making the transition from excited states to the ground state. What does the spectrum of this cloud of gas look like?

It will consist of a few bright emission lines at specific wavelengths

If the Earth were moved to half its current distance from the Sun, how would the force of gravity by the Sun on the Earth change?

It would become four times stronger

What would happen to the Earth if the Sun's gravity somehow turned off

It would continue to move in a line in the same direction it was moving when he gravity turned off

In what ways does a 30 meter telescope outperform a 10 meter telescope?

Its images are 9 times brighter than a 10 meter

What time of year is it dark all day (and night) at the South pole of Earth

June

How long would one need to observe a star on a 10 meter telescope to collect the same amount of light as one collects in one hour on a 5 meter telescope?

15 minutes

According to Newton's Second law of motion, if the net force acting on he object increases while the mass of the object remains constant, what happens to the acceleration?

Acceleration increases

What is true?

An absorption spectrum appears as a continuous spectrum interrupted by a series of dark lines

What causes the black lines in absorption spectra?

Cooler material between the light-emitting object and the observer

If the Earth's moon was full on May 11, 2007, when was it next in the first quarter phase after this full moon?

May 22

A moon orbits a planet in exactly the same plane as the planet orbits its star. How often does this planet experience a solar eclipse?

Once every orbit of its moon (its month)

What did Newton's Law of Universal Gravitation tell us about how gravity works?

The force of gravity from the sun will be stronger on an object with more mass

If a telescope in space is only 1/4 the diameter of a telescope on Earth, what is true?

The larger telescope can observe objects fainter than the space telescope.

A new planet orbits faster than the Earth orbits the sun and it rotates more slowly than the earth rotates. What is true?

The new planet has a shorter year than Earth but a longer day than Earth

Consider a planet whose rotation axis is NOT tilted with respect to its orbital plane. What are the seasons like on this planet?

There are no seasons

If Earth had its orbit changed so that at all points along its orbit it was always the same distance from the Sun (circular orbit), how would this affect the seasons on Earth?

They would be the same as they are now

Compare frequency of xray versus regular light.

Xray has a larger frequency than visible light

Even the largest ground-based telescopes have resolution restrictions imposed by:

atmospheric blurring of images

The spectrum of an oxygen lamp looks different than the spectrum of a sodium lamp because:

each atom has a unique set of electron orbits

If the frequency of radiation is twice as large then its wavelength is:

half as large

If the earth rotated on its axis more slowly than it does now:

its days would be longer

How much of the total surface area of the moon is illuminated by sunlight during the full moon phase?

one half

Dark lines in an absorption spectrum represent:

particular energies of light coming from a distant object that are absorbed by material in between

What is false?

the energy of a photon increases in proportion to the wavelength of the radiation

If you were to sit on the ground, there would be a force due to gravity pulling you toward the Earth. Which of the following is true according to Newton's 3rd law?

you are pushing the earth away from yourself with the same force

When you magnify an object with a telescope, what else happens to your view of the sky?

your field of view gets smaller, so you can only see a small area of sky