Answer: B. Allow light to pass through. :)
You’re answer is C Explaination if the pit side was facing earth it wouldn’t be a new moon
Answer:

Explanation:
R = Rydberg constant = 
= Principal quantum number of an energy level = 2
= Principal quantum number of an energy level for the atomic electron transition = 4
Wavelength is given by the Rydberg formula

The wavelength of the light emitted is
.