Question

what is the difference between mirror formula and lens formula?
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Answer 1

Answer:

The main difference between mirror and lens is that image forms by reflection, as the light falls on a mirror. In lens, the image is formed by refraction.

By the term 'mirror' we mean a shiny piece of glass, that is polished from the back, which reflects a clear image of the object, placed in front of it. On the other hand, Lens is a transparent piece of glass, with a spherical surface, that concentrates or disperses the rays of light falling on it.Mirror formula is given as, 1f=1v+1u. Here, f is denoted for focal length which is the distance between pole and focus of a concave or convex mirror. v Is denoted for image distance which is measured from pole to the point where image of an object is formed.

Answer 2

Answer:  

--> Mirrors  

Definition The mirror is glass with one side silvery backing produces                             an image by reflection on only one surface.  

Curvature  It can be plane or curved.  

Law          Laws of reflection  

Types There are two types: concave and convex

Focal point Plane mirror has no focal point

Uses Mirror tiles, dressing table, periscope, camera, looking glass .

     

        --> Lens

Definition  The lens is a transparent substance that produces images by refraction in any surface of the two surfaces.

Focal point  It has 2 focal points for each type of lens

Types  There are six types of lenses.

Law  Laws of refraction

Curvature  Always curved at one or two surfaces.

Uses  Refraction unit, spectacle glass, flashlight, telescope, microscope

lens formula:

(1 / f) = (1 / v) - (1 / u)

Mirror formula:

(1 / f) = (1 / v) + (1 / u)