Question

Why is it difficult between red and green color objects in the dark or at night?
A.Rods work well only during day time
B.Cones work well only during day time
C.Rods work well only during night time
D.Cones work well only during night time

Answer 1

Before attempting this question, one should have prior knowledge about the concept of eyes and also remember that the eye consists of rods and cones which work as photoreceptors in eyes, using this information can help you to approach the solution of the question.

Complete answer:
Before approaching the solution let’s find out what helps to differentiate between red and green color object in night or in dark
The reason which helps in differentiating the colors is the human eye where the two parts play the main role that are rods and cones which functions as a photoreceptor which helps the light to perceive in the human eye.
The rods of the human eye which functions in dim lights to identify the objects whereas it is unable to identify the color of the object but with the help of the cones of the human eyes we are able to identify the object and its color but the cones of the human eyes are unable to function in dim light. So, these rods and cones function accordingly with the amount of light present.
So, as rod functions in dim light but unable to identify the color of objects whereas cones help in identify the color but not in dim light
Therefore, the reason it is difficult to differentiate between red and green objects in dark or in night because cones work well, only during night time

Hence, option B is the correct option.

Note:
In many circumstances the human eye is an organ that reacts to light. The human eye enables vision as a conscious sense organ; rod and cone cells in the retina enable perception and vision of conscious light, including color differentiation and depth perception. Similar to other mammals’ eyes, the non-image-forming photosensitive ganglion cells of the human eye in the retina receive light signals that influence the adjustment of the pupil’s scale, the control and suppression of hormone melatonin and the body clock’s entrainment.