Suppose you are an observer standing on the moon, looking back at earth.

if the moon is in the waxingquarter phase, what phase of the earth would you see?

a. waxing quarter

b. full

c. new

d. waning quarter

e. none; the earth doesn't have phases

D. waning quarter

Explanation:

The Moon is a natural satellite of Earth and reflects the light of Sun to become visible from the Earth. It shows various phases during its revolution around the Earth depending on how much part of the lit up portion of the Moon is towards Earth. Just like Moon shows phases, if we go on Moon the Earth will show various phases.

When the Moon will be in waxing quarter phase i.e. as seen from Earth, we will see a semicircular Moon with its right side lit up. At the same time if someone from the Moon sees Earth, the Earth will show a waning quarter phase. It will be seen as semicircular but left side will be lit up.

absorption lines are where light has been absorbed by the atom thus you see a dip in the spectrum whereas.

emission spectra have spikes in the spectra due to atoms releasing photons at those wavelengths.

explanation:

the answer is b

explanation: