Astarís light is shifted to the red part of the light spectrum.

what does this mean about the length of light waves and movement of the star?

a.
the wavelengths are getting shorter, meaning the star is moving toward the observer.

b.
the wavelengths are getting longer, meaning the star is moving toward the observer.

c.
the wavelengths are getting shorter, meaning the star is moving away from the observer.

d.
the wavelengths are getting longer, meaning the star is moving away from the observer.

answer: electrons

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.