Energy is related to mass by: E = mc2
If we want to know the mass converted to energy per second, we can express this relation as
L = Δmc2,
and solve for Δm, where Δm represents the change in mass per second.
Δm =
L
(3 ✕ 108 m/s)2

365.25 earth days are in the year of a light year

answer: the correct answer for the fill in the blank is rods.

rods are the specialized photoreceptor cells that are present in the retina of human eye. they are responsible for vision in the night time ( also called scotopic vision). they have very low visual acuity and color distinguishing ability.

as they are responsible for vision in night time, therefore they are found predominantly in the nocturnal animals.