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# Write the Formula for a Lens Connecting Image Distance (V), Object Distance (U) and the Focal Length (F). How Does the Lens Formula Differ from the Mirror Formula? - CBSE Class 10 - Science

ConceptReflection of Light Spherical Mirrors

#### Question

Write the formula for a lens connecting image distance (v), object distance (u) and the focal length (f). How does the lens formula differ from the mirror formula?

#### Solution

Lens formula is:

1/v-1/u=1/f
Now, the mirror formula is given by:

1/v+1/u=1/f
In both the formulas,
u = Object distance
v = Image distance
f = Focal length
In mirror formula, positive sign is present between the reciprocals of image distance and object distance  .
In lens formula, negative sign is present between the reciprocals of image distance and object distance.

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Solution Write the Formula for a Lens Connecting Image Distance (V), Object Distance (U) and the Focal Length (F). How Does the Lens Formula Differ from the Mirror Formula? Concept: Reflection of Light - Spherical Mirrors.
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