Sensing and passing of image information
Sensing and Passing of Image Information
Sensing And Passing On Image Information
The image formed by the eye-lens on the retina is real, inverted and much smaller than the actual size of the object. The eye passes on image information to the brain. The brain processes this information to show us an erect image, which is much larger than that formed on the retina.
To sense image information, the retina has two types of sense receptors. They are called rods and cones (named so because that is how they look under high magnification). There are about 10 million cones and 100 million rods on the retina. The rods can sense very small amounts of light, while the cones need more light to perform their task of sensing colours and details. That is why in dim light we are able to see shapes but not colours and details. The rods and cones are actually the ends of special light-sensitive nerve cells. The long fibres (or axons) of these nerve cells come together at a point on the retina to form an optic nerve, which is connected to the brain. When light falls on the rods and cones, electrical signals are generated.
The image formed by the eye lens on the retina is _________________ | |||
| Right Option : C | |||
| View Explanation | |||
The blind spot refers to the area where _____________. | |||
| Right Option : B | |||
| View Explanation | |||
Which cells respond to colour of light ? | |||
| Right Option : C | |||
| View Explanation | |||
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It has a great methodology. Students here can get analysis to their test quickly.We can learn easily through PPTs and the testing methods are good. We know that where we have to practice
Barkha Arora
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Om Umang
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Cheshta
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