at WHAT distance should an object be placed FROM a convex lens of focal length 18cm to obtain. an image at 24 cm FROM it on the other side ?
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solution :
object distance, u = ? (to be find)
image distance, v = 24 cm
focal length , f = 18 cm
we know that; 1/f = 1/v - 1/u
=> 1/18 = 1/24 - 1/u
=> 1/18 - 1/24 = -1/u
=> -1/u = 1/72
=> u = -72cm
Hence; object is placed at 72cm from lens.
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hope u get it.☺
#Amrit⭐
object distance, u = ? (to be find)
image distance, v = 24 cm
focal length , f = 18 cm
we know that; 1/f = 1/v - 1/u
=> 1/18 = 1/24 - 1/u
=> 1/18 - 1/24 = -1/u
=> -1/u = 1/72
=> u = -72cm
Hence; object is placed at 72cm from lens.
==============
hope u get it.☺
#Amrit⭐
susanna1:
thanks for ur answer
it really helped me
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I am unable to mesaage anyone .......in This brainly
Can u tell me why this is happening ??
plsss
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Explanation:
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