In a Binary Star System,one Component Is Found to Have

question 295

Multiple Choice

In a binary star system,one component is found to have about 3 solar masses,the other about 7 solar masses.The 3-solar-mass star is visible from Earth,but the 7-solar-mass star is not.Theoretical considerations tell us that the 7-solar-mass star must be a:

• A) neutron star.
• B) cool planetary object.
• C) white dwarf.
• D) black hole.

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Definitions:

μm

Micrometer, a unit of length in the metric system equal to one millionth of a meter, used to measure small distances, such as those in biological cells and structures.

Total Magnification

The combined magnifying power of an optical system, calculated by multiplying the objective lens magnification by the ocular lens magnification.

Ocular Lens

A transparent structure in the eye that, along with the cornea, helps to refract light to be focused on the retina.

Objective Lens

The lens in a microscope closest to the specimen that helps to magnify the image of the object being observed.