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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

Neutrinos are experimentally determined to have an extremer small mass. Huge numbers of neutrinos are created in a supernova at the same time as massive amounts at light ate ?rst produced. When the 1987A supernova occurred in the Large Magellanic Cloud, visible primarily in the Southern Hemisphere and some 100,000 light−years away from Earth, neutrinos from the explosion were observed at about the same time as the light from the blast. How could the relative arrival times of neutrinos and light be used to place limits on the mass of neutrinos?

To determine

The way could the relative arrival times of neutrinos and light be used to place limits on the mass of neutrinos.

Explanation

When the 1987A supernova occurred in the Large Magellanic Cloud, visible primarily in the Southern Hemisphere and some 100,000 light-years away from Earth, neutrinos from the explosion were observed at about the same time as the light from the blast.

The above observation can be explained based on given facts.

Since the neutrinos are almost massless, and do not have any charge in them also they do not get into any interaction with nucleons by the nuclear force which is strong.

It travels almost with the speed equal to the light's speed and they have very less time to change the state of a nucleus with which they interacted with.

This is because they do not have any charge and also, they are also not electromagnetic waves, they also do not get into any interaction with the electro-magnetic force.

Though they interact by very feeble nuclear force of very less range.

Hence, neutrinos can be escaped by a detector and can penetrate any shielding.

Though, neutrinos that carry some energy and momentum which is angular (known as fermions with the spins which are multiple of half-integral) and momentum which is linear does not responsible for by the child nucleus and the electron alone.

According the law of conservation applicable in all situations, the number of family members of electron family is a constant number.

An altimeter family member will also get created when an electron gets created.

This is like the condition in which the total charge is zero, but we can say that there is conservation of charge and this because the total number of opposite charges which are positive and negative charge should be created so that the total charge is zero in a particular reaction

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