Question

Please answer me dont copy with google nd other apps please Teacher tells me.It's urgent please.menay phelay v chora h pr samaj me nhi aaya.​

Answer 1

Answer:

1.ON THE FOCAL POINT.

2.●DON'T PUT YOUR HAND BETWEEN MIRROR AND PAPER IT MAY BURN.

●SEE AROUND IS THERE ANY COMBUSTIBLE OR

SUBSTANCE SHOULD NOT BE THERE.

3.BULGE OUTWARDS WILL BE CONVEX,BULGE INWARDS WILL BE CONCAVE.

3.LINE OF CURVATURE.