a lens is of focal length 40 cm .what is it power?
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Answered by
5
hello@
here is u r answer##
________________________________________
answer
focal length , f = 40 cm
power (p) = 100/ f( cm)
100 /40
2.5 D
the power of the lens is +2.5 D.
I hope help u##
### rishu##
@rishu
here is u r answer##
________________________________________
answer
focal length , f = 40 cm
power (p) = 100/ f( cm)
100 /40
2.5 D
the power of the lens is +2.5 D.
I hope help u##
### rishu##
@rishu
Answered by
2
ʜᴇy ᴜꜱᴇʀ
ʜᴇʀᴇ ɪꜱ yᴏᴜʀ ᴀɴꜱᴡᴇʀ :-
----------------------------------------------------------
ꜰᴏᴄᴀʟ ʟᴇɴɢʜᴛ = 40 ᴄᴍ = 0.4 ᴍ
ᴩᴏᴡᴇʀ ( ᴅ ) = 1/ꜰᴏᴄᴀʟ ʟᴇɴɢʜᴛ ( ʟ )
= 1/0.4
= 2.5 ᴅ
ꜱᴏ ᴛʜᴇ ᴩᴏᴡᴇʀ ᴏꜰ ʟᴇɴꜱ ɪꜱ 2.5 ᴅ
ʜᴇʀᴇ ɪꜱ yᴏᴜʀ ᴀɴꜱᴡᴇʀ :-
----------------------------------------------------------
ꜰᴏᴄᴀʟ ʟᴇɴɢʜᴛ = 40 ᴄᴍ = 0.4 ᴍ
ᴩᴏᴡᴇʀ ( ᴅ ) = 1/ꜰᴏᴄᴀʟ ʟᴇɴɢʜᴛ ( ʟ )
= 1/0.4
= 2.5 ᴅ
ꜱᴏ ᴛʜᴇ ᴩᴏᴡᴇʀ ᴏꜰ ʟᴇɴꜱ ɪꜱ 2.5 ᴅ
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