Q39 of 234 Page 270

Name the cells on the retina of an eye which are sensitive to

(i) bright light (ii) dim light (iii) sensation

(i) The cells on the retina of an eye which are sensitive to bright light is Cones.

(ii) The cells on the retina of an eye which are sensitive to the dim light is rods.


(iii) The cells on the retina of an eye which are sensitive to sensation is Cones.


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38

List, in order, the parts of the eye through which light passes to reach the retina.

 39

What happens to the size of pupil of our eye

(i) in dim light (ii) in bright light ?

 40

Draw a simple diagram of the human eye and label clearly the cornea, iris, pupil, ciliary muscles, eye �

lens, retina, optic nerve and blind spot.

 40

Describe the working of the human eye with the help of the above diagram.