Respuesta :
Answer:
Cones
Explanation:
Cones are the photoreceptor cells that are sensitive to the bright light and produce the color vision. Stimulation of combinations of red, blue and green cones produce color vision.
Since Petra enters the brightly lit room to perceive the colors of the rainbow, various combinations of three types of cones present in the retina of her eyes would be activated to produce the vision of rainbow.
A special neuron found in the eyes for perceiving the colours by converting the light into an electrical signal is called a photoreceptor. Cones are the photoreceptors that will be most useful.
What are cones?
The cell present in the retina of the eye is responsible for the visuals and colour is called photoreceptors. There are four photoreceptors type that enables to perceive the light.
Cones are the type that is sensitive to the dark and bright light to perceive the image and convert them into an electrical signal for the nerves of the brain to comprehend. They work on the basis of the primary colours and their combinations.
Therefore, option a. cones are the most useful.
Learn more about cones here:
https://brainly.com/question/5936481
