Deck 58: The Sizes of Stars

Question 1

If you know a star's temperature and use the Stefan-Boltzmann law you can find _____.

A) luminosity
B) distance
C) size
D) mass

Answer 1

luminosity

Question 2

A technique to find diameters of stars using short exposures is called

A) luminosity measurements.
B) speckle interferometry.
C) mass interferometry.
D) parallax.

Answer 2

speckle interferometry.

Question 3

Using the Stefan-Boltzman law to find luminosity requires _______.

A) radius and temperature
B) velocity and distance
C) brightness and radius
D) period and temperature

Answer 3

radius and temperature

Question 4

The technique of combining the light from two or more smaller telescopes to obtain an image that is equivalent to that of a much larger telescope is called

A) speckle imaging
B) adaptive optics
C) interferometry
D) angular resolution

Question 5

________ create a light curve we can estimate the stars' sizes from.

Question 6

Using two or more telescopes to measure the angular sizes of stars is called ______.

Question 7

Eclipsing binaries cannot be used to measure masses of stars.

Question 8

New interferometry techniques have measured many sizes of stars far from Earth.