Question

all lens formulas in light chapter pls answer I'll mark as brainliest

Answer 1

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$\huge\boxed{Hey there !}$

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

1v−1u=1f

☢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

m=Height of image h’/Height of object h

=Distance of image v/Distance of object u



☢The power of a lens is reciprocal of the focal length.

Power P=1/Focal length

f/Power

P=1/Focal length f

Or, P=1/fP=1/f

The SI unit of Power of lens is dioptre and it is denoted by ‘D’.


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Answer 2

Hey mate....

here's the answer...

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

1v−1u=1f

1v-1u=1f

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.

Hope this helps❤