The intensity of an image of an object formed by a convex lens is i.
the intensity of this image can be made i÷4 by
(1) decreasing the size of the object.
(2) decreasing the sidtance of the object from the lens.
(3) covering one half of the lens with a black paper.
(4) covering three fourth of the lens with a black paper.

show the wavelengths of a wave. show the crests of a wave.

i need with 1.3.2 investigate cycling o2 and co2 apex

we need to see it

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.