Question

diff bw concave and convex lens. With images

Answer 1

The lens which merges the light rays at a particular point, that travels through it, are a convex lens. The lens which disperses the light rays around, that hits the lenses, are called a concave lens.
In the convex lens, the curve is outward facing, whereas, in the concave lens, the curve faces inward.
When the light rays pass through the convex lens, it converges the light rays and focuses on one point. On the other hand, when the light rays go through the concave lens, it diverges the beams, i.e. they spread out
.The structure of convex lens is like, thicker at the centre and thinner at the edges. Conversely, the concave lenses are thinner at the centre and thicker at its edges, in structure
.The focal length of a convex lens is positive, while that of a concave lens is negative.
Generally, a convex lens forms a real image, but it can also create a virtual image when the object is in the middle of the focus and optical centre. On the contrary, the image formed by the concave lens is erect, virtual and smaller, than the object.

Answer 2

convex mirror is spherical mirror where the mirror surface is on the outside of the spherical curve and concave mirror is the spherical mirror where the mirrored surface is on the inside of the spherical curve and convex mirror always produce image upright, virtual and smaller than the object.