When an electron goes from a higher energy level back down to the ground state, what is the most accurate way to describe the light it emits? always a single photon, with less energy than the electron absorbed to move up to the higher level. the electron does not emit light but absorbs light. one or more photons, always with less total energy than the energy the electron absorbed to move up to the higher level. always a single photon, equal in energy to the energy the electron absorbed to move up to the higher level. one or more photons, equal in total energy to the energy the electron absorbed to move up to the higher level.

One photon, same energy.

Explanation:

When an electron goes from a higher energy level back down to the ground state the most accurate way to describe the light it emits is always a single photon, equal in energy to the energy the electron absorbed to move up to the higher level, since the energy between levels is already determined, and in these cases is always only one photon that is emitted or absorbed.

d₁ = displacement of tern from arctic to antarctic = 11000 miles

d₂ = displacement of tern from antarctic to arctic =   - 11000 miles

d = total displacement for the journey

total displacement for the journey is given as

d = d₁ + d₂

d = 11000 + (-11000)

d = 0 miles

t₁ = time of travel from arctic to antarctic = 3 months = 3 x 30 days = 90 days

t₂ = time of travel from antarctic to arctic = 3 months = 3 x 30 days = 90 days

t = total time of travel

total time of travel is given as

t = t₁ + t₂

t = 90 + 90

t = 180 days

average velocity is given as

average velocity = total displacement/ total time

v = d/t

v = 0/180

v = 0 miles/day