What is the wavelength of the shortest wavelength light visible to the human eye?
a. 400 nm
b. 4000 nm
c. 7000 nm
d. 700 nm
e. 3108 m
Question 2How is a luminosity class assigned to a star?
a. by combining the apparent magnitude with the star's parallax
b. by measuring the period of variability in the star's apparent magnitude
c. by studying the absorption line width in the spectrum of the star
d. by observing the angular size of the star's image in a photograph or digital image
Question 3The largest single-dish radio telescope is
a. suspended on cables in a valley.
b. buried deep in a mine underground.
c. orbiting in space.
d. suspended from balloons in the upper atmosphere.
Question 4Stars in the upper right part of the Hertzsprung-Russell diagram are always ____ when compared to stars near the middle of the diagram.
a. cooler
b. brighter as seen from Earth
c. larger
d. smaller
e. more massive
Question 5The resolving power of a telescope is
a. a measure of the minimum angular separation that can be seen with the telescope.
b. a measure of the maximum angular separation that can be seen with the telescope.
c. a measure of the amount of light that the telescope can gather in one second.
d. the separation between the objective and the image.
e. a measure of how blurry object appear in the telescope.
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