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College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000

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BuyFindarrow_forward

College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000
Textbook Problem

Discuss the possibility that star velocities at the edges of galaxies being greater than expected is due to unknown properties of gravity rather than to the existence of dark matter. Would this mean, for example, that gravity is greater or smaller than expected at large distances? Are there other tests that could he made of gravity at large distances, such as observing the motions of neighboring galaxies?

To determine

The possibility that the velocities of star at the periphery of galaxies is more due to some unknown properties of gravity rather than existence of dark matter. Does it mean that gravity is greater or smaller than the expected value at large distances. Also, determine whether there are other tests that could be made about gravity at large distances or not.

Explanation

According to the study by Verlinde, the outer regions of galaxies rotate at a faster pace as compared to the inner regions of galaxy due to the presence of different kinds of matter in different quantity. Thus, it is clear from the Verlinde study that variation in speed is due to the presence of different material types (which could be black matter ), considering the presence of gravity alteration due to black matter presence it can be stated that the star velocities are different in the outer and inner galaxies due to the difference in gravitational force...

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