what is meant by power of a lens write the SI unit student uses a lens of focal length 40 cm another of minus 40 cm write the nature and power of each lens
Answers
Answered by
3
Answer:
the power of lense is defined as
p=1/f
where,p=power of lense
f=focal length
the si unit of power of lense is D or diopter .
f=40 cm
therefore nature of lense is concave
f=-40
therefore nature of lense is cocave
thnks
Similar questions