Prove that the power of accommodation of a normal human eye is 4D.
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Answered by
20
vision length 25 cm
focal length f=0.25m
power=1/f =1/0.25
=100/25=4D
focal length f=0.25m
power=1/f =1/0.25
=100/25=4D
Answered by
15
HI !
The minimum distance needed to see objects clearly is called the near point.
For humans,the near point is 25 cm ( 25/100 m)
Hence,
Focal length = f = 25/100 m
Power = 1/f
= 1/(25/100)
= 100/25
= 4 D
Proved.
The minimum distance needed to see objects clearly is called the near point.
For humans,the near point is 25 cm ( 25/100 m)
Hence,
Focal length = f = 25/100 m
Power = 1/f
= 1/(25/100)
= 100/25
= 4 D
Proved.
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