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How many principal focus are in lens
+2
votes
asked
Mar 14, 2019
in
Class 10
by
kratos
How many principal focus are in lens
(A) 1
(B) 2
(C) 8
(D) 4
class-10
optics
refraction of light
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1
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+1
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answered
Mar 1, 2021
by
kratos
Best answer
2
principal focus are in lens.
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