(i) The focal length of the eye lens increases when eye muscles are relaxed and lens becomes thinner. |
(ii) Stars appear to twinkle because of movement of air only. |
(iii) In the dim light, the size of pupil increases. |
(iv) The blind spot on retina has high concentration of nerve ending. |
A)
(i)
(ii)
(iii)
(iv)
T
T
F
F
B)
(i)
(ii)
(iii)
(iv)
F
F
T
T
C)
(i)
(ii)
(iii)
(iv)
T
F
T
F
D)
(i)
(ii)
(iii)
(iv)
F
T
F
T
Correct Answer: C
Solution :
Stars appear to twinkle because o1 atmospheric refraction and movement of air. There is no nerve endings in blind spot and it is insensitive to light.You need to login to perform this action.
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