in this question why focal length is taken positive
Attachments:
avelinteresa:
it is because it is convex lens
convex lens focal length negative
****positive**** sorry
concave lens negative
Answers
Answered by
2
because focal length of convex lens and convex mirror is taken as positive and concave lens and concave mirror is taken as negative
but how
because focal length is in front of every lens and mirror so it should be negative
in the case of convex lens focal length is measured from optical centre it is in the direction of incident ray so it is taken as positive
HOPE IT HELPS PLEASE MARK IT AS BRAINLIEST
Answered by
1
because object is above the principal axis
Similar questions