Quiz 2 Flashcards
The visible surface of the sun is called the
photosphere
After reading the website badastronomy.com you learned why the US flag planted by Apollo 11 astronauts was seen waving. What was the cause?
When the astronauts planted the flag they had to rotate the pole on which the flag is mounted and it started moving back and forth
If the moon were covered with water, the number of tidal bulges on it would be
2
Zero degrees Celsius is equal to how many Kelvins?
273
If we observe a light source such as a star moving away from us the wavelengths appear longer than it actually is. This is called
red shifted
The distance between successive peaks of the wave is called the
wavelength
The world’s largest radio telescope is located in which country
Puerto Rico
We can determine the elements in the atmosphere of a star by examining
Its absorption spectrum
The frequency at which a star emits the most light depends on the stars
temperature
The two most abundant gases in the Earth’s atmosphere are
Nitrogen and Oxygen
What do we call the bending of light as it passes from one medium to the next?
Refraction
What do we call the technique of linking two or more telescopes together so they act as one
Interferometry
Which of the following is not electromagnetic radiation?
Sound Waves
What type of radiation did the NASA’s space based Compton Observatory launched in 1991 image?
Gamma Rays
Why are achromatic lenses used in optical telescopes?
They reduce color fringing
The best place for an optical telescope is a place where the air is
thin and dry
Maria on the Moon are
flat plains
Between 1969 and 1972, how many men walked on the moon?
12
The Moon is about how far from Earth?
240,000
The eyepiece of a telescope is primarily used
as a magnifier
The Moons point in its orbit when it is the shortest distance from Earth (closest) is called?
Perigee
When the tides due to the Sun correspond to the Moon’s tides we see extreme tides on Earth called spring tides
True
An ______ is caused by charged particles trapped in the Earth’s magnetic field striking atoms in the upper atmosphere
Aurora
If there are 48,000 cycles (wavelengths) a minute, that would translate to
800 hertz
Light waves of greater frequency have a longer wavelength
False
