When an electron in a quantum system drops from a higher energy level to a lower one, the system emits an electron emits a plasmon emits a photon emits a neutron

emits a photon

Explanation:

When an electron in a quantum system drops from a higher energy level to a lower one, the system emits a photon. According to the law of conservation of energy, the energy of the emitted photon is equal to the difference in energy between the two energy levels:

The opposite transition can also occur: the system can absorb a photon such that the electron jumps from the lower energy level to the higher level. As before, the energy of the emitted photon is equal to the difference in energy between the two energy levels:

b. latent learning (the word "latent" itself means something that exists but isn't obvious, only under certain conditions! )

answer: at 24 february, 2014 the population gets twice of its initial population.

explanation:

since we have given that

the population for alpha city, t years after january 1, 2004 is given as

first we find out the initial population, i.e. t=0,

so, our quadratic equation becomes,

according to question, we have said that if the population has twice its initial population, then it becomes

so, time taken to reach this above mentioned population is given by

now, we know that time can't be negative so, we take t=9.149 years.

hence, at 24 february, 2014 the population gets twice of its initial population.