Question

How do you perceive the colour of an object?

Answer 1

Photoreceptors are cells that are sensitive to light. They are of two types – rods and cones. These are present in the retina. Cones help in distinguishing colours. There are three types of cone cells – those responding to green light, those responding to blue light, and those responding to red light. These cells are stimulated by different lights, from different sources. The combinations of the signals generated help us see the different colours.

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Answer 2

Colour of an object is perceived by the cone cells present in the retina of our eyes.

• Retina has the photoreceptor cells rod and cone , where colour of different wavelength and light is distinguished by cone cells.

• Cone cells are of three types distinguishing three wavelengths of light , red , blue and green.

• Due to different mechanisms occuring in the brain, it sends signal back to the eye helping to recognise the colour.