two lenses of powers -1.5D and +2.75D are kept in contact. find the focal length of the combination?
Answers
Answered by
24
total power = -1.5D+2.75D= +1.25D
focal length is inversely proportional to power .
therefore focal length = 1/1.25
= 0.8 m
focal length is inversely proportional to power .
therefore focal length = 1/1.25
= 0.8 m
virender98:
your answer is right
thanks bro
Answered by
10
Answer:Power of Lens1 -1.5D and Lens2 +2.75D
The power of Lens1 and 2 is 1.25D
Focal length is inversely proportional to power so 1/1.25=0.8m.
Explanation:
Similar questions