Karnataka Secondary Education Examination BoardKarnataka SSLC
Advertisement Remove all ads

Magnification of a Lens

Advertisement Remove all ads

Topics

notes

LENS FORMULA AND MAGNIFICATION:

The relation between distance of object, distance of image and focal length for a lens is called lens formula.

`1/"v"`−`1/"u"`=`1/"f"`

Where, v is the distance of image, u is the distance of object, and f is the focal length of lens. Distance of object and image is measure from the optical centre of the lens. The sign for distance is given as per convention.

The lens formula is valid for all situations for spherical lens. By knowing any of the two the third can be calculated.

Magnification:

The ratio of height of image and that of object or ratio of distance of image and distance of object gives magnification. It is generally denoted by ‘m’.

m=`("Height of image h’")/("Height of object h")`

=`("Distance of image v")/("Distance of object u")`

The positive (+) sign of magnification shows that image is erect and virtual while a negative (-) sign of magnification shows that image is real and inverted.

 

If you would like to contribute notes or other learning material, please submit them using the button below.

Shaalaa.com | Light Reflection and Refraction part 18 (Maginfication power of Lens)

Shaalaa.com


Next video


Shaalaa.com


Light Reflection and Refraction part 18 (Maginfication power of Lens) [00:04:52]
S
Advertisement Remove all ads
Share
Notifications

View all notifications


      Forgot password?
View in app×