answer this question with clear explanation please explain
Answers
Answer:
Lens formula is the formula which relates Focal length of lens (f) , object distance (u) and image distance (v).
Let us consider that an object has been placed at a distance u on the left side of a lens and an image is produced (may be on left side ir on right side of lens depending on situations) , then we can relate the 3 variables as :
Now following sign convention , since the object is placed on the left side of the lens , it's position will be negative (-u)
An important point to note is that :
While putting the value of Object distance in this equation, you have to simply put the value as sign convention has already been used
Explanation:
Answer:
Lens formula is the formula which relates Focal length of lens (f) , object distance (u) and image distance (v).
Let us consider that an object has been placed at a distance u on the left side of a lens and an image is produced (may be on left side ir on right side of lens depending on situations) , then we can relate the 3 variables as :
\bigstar \: \: \: \dfrac{1}{f} = \dfrac{1}{v} - \dfrac{1}{u}★
f
1
=
v
1
−
u
1
Now following sign convention , since the object is placed on the left side of the lens , it's position will be negative (-u)
\bigstar \: \: \: \dfrac{1}{f} = \dfrac{1}{v} - \bigg(\dfrac{1}{ - u} \bigg)★
f
1
=
v
1
−(
−u
1
)
\implies \: \: \: \dfrac{1}{f} = \dfrac{1}{v} + \dfrac{1}{ u}⟹
f
1
=
v
1
+
u
1
An important point to note is that :
While putting the value of Object distance in this equation, you have to simply put the value as sign convention has already been used