Question

explain mirror formula and its magnification Write down the sign conversation for reflection by Spherical mirror ?​

Answer 1

Sign convention for reflection by spherical mirror is New Cartesian sign Conention.

• The object is placed left of the mirror.The light falls on LHS.
• All distances parallel to principal axis are measured from pole of the mirror
• All origin RHS ( x-axis) are taken as positive while on LHS origin (x-axis) are taken as negative.
• Distance measured perpendicular to above principal axis (y-axis) are positive.
• Distance below principal axis perpendicular (y-axis) are negative.

The mirror formula for reflection -

1/v +1/u =1/f

Magnification is for nature of image and size of an object.

m = height of image / height of object .

m=h*/h. or -v/u

Answer 2

Answer:

This formula is valid for all kinds of spherical mirrors, for all positions of the object. Although one needs to be careful about the values, one puts for u,v and f with appropriate sign according to the sign convention given above.

Explanation:

the distance is measured from the pole. if you travel in the direction of incident ray the sign will be positive and if you travel in the opposite direction of incident ray the sign will be negative all you need to do is just be careful about the direction of the incident ray.

f is Focus where all the rays meet U is the distance of object from the pole and V is the distance of image from the pole

in the image you can see the incident rays travelling from left to right so first let's measure U. first you need to go to the pole and see where is U in the image. from the pole U is towards left of the pole so hence you can see that we are travelling in opposite direction of the incident rays, the incidents rays are travelling from left to right but for measuring U we are travelling from right to left so we will take U as negative.

for measuring, as V is located toward right from the pole. we will travel towards right from the pole and as you can see this direction will be in the same direction as the incident rays that is from left to right so we will take this distance as positive

the magnification is

all you need to do is put the values of V and u in this formula but be careful about the sign convention of V and u

[1/f=1/v+1/u]mirror formula

m=-v/u

for concave mirror f=-ve,u=-ve and for convex mirror u=-ve rest are postive

as you can see I put a lot of effort in explaining this question to you so don't forget to mark my answer the brainliest If this helps you