Question

explain reflection from spherical mirror​

Answer 1

there are two types of spherical mirror convex and concave in concave mirror there are 6 cases of reflection 1) when object is at infinity 2) when object is at beyond C 3)when object is between C and F 4) when object is at F 5) when object is at C 6)when object is between P and F but in convex mirror there are only two types of cases 1) when object is at infinity 2) when object is between infinity and pole

Answer 2

$\bold{DETAILS\:OF\:SPHERICAL\:MIRROR}$

A mirror is a highly polished, smooth reflecting surface, which clearly allows REFLECTION OF LIGHT to take place in it. A spherical mirror, is however a mirror, which is a part of a hollow sphere.

Now, spherical mirror's reflecting surface can either be curved inwards (CONCAVE MIRROR), or outwards (CONVEX MIRROR)

Every spherical mirror have some specific parts which you must know like principal axis, centre of curvature, linear aperture, radius of curvature, pole and principal focus.

Now, let us firstly go with concave mirror.

[1] When a ray of light falls on falls on pole of the spherical mirror (either concave or convex), then it gets reflected in other direction making same angle as that of the angle of incidence.

[2] When a ray of light passes through the centre of curvature of a spherical mirror then it retraces its path, i.e., it gets reflected back along the same path. No change of path occurs. As a result angle of incidence = angle of incidence = 0°.

[3] When a ray of light passes through (in case of concave mirror) or going towards (in case of convex mirror) the principal focus of the mirror, then after reflection that ray of light travels parallel to the principal axis.

[4] When a ray of light travels parallel to the principal axis, then, after reflection that ray of light passes through (in case of concave mirror) or going towards (in case of convex mirror) the principal focus of the mirror.

» While constructing ray diagrams, if you are going to construct point no. 4 on the basis of picture (i.e., diagram), then you can observe if you extend the reflected ray in case of a convex mirror, it will meet to focus of the mirror [only when, the incident ray travelled parallel to principal axis]. So, the light rays appear to come from (diverge) from focus point.

You should know that a concave mirror has a real focus whereas a convex mirror has no real focus (i.e., it has a virtual focus). Hence, no rays of light actually passes through the focus of the convex mirror. They are just directed towards that focus point.