Reflection is defined as the optical phenomenon where light rays come back after hitting a smooth surface.

Reflection occurs when a light ray bounces back from a barrier.

A ray of light which bounces off the surface of mirror is called reflected ray.

Newton used corpuscular theory to explain reflection and refraction of light. According to Sir Isaac Newton's Corpuscular Theory a luminous body continuously emits tiny, light and elastic particles called corpuscles in all directions. When these particles fall on the retina of the eye, they produce the sensation of vision.

Normal is perpendicular drawn to the surface at the point of incidence so that angle between incident ray and normal is angle of incidence.

Normal is the line drawn perpendicular to the surface of the mirror at the point of incidence. 

Light moving in one medium when falls at the surface of another medium, part of light returns to the same medium. Some part is transmitted and the rest is absorbed.  No material is a perfect reflector. Almost all surfaces absorb some part of light.

The ray of light which gets reflected from a polished surface is called reflected ray of light.

The ray of light which emerges after bouncing off the surface of a mirror is reflected ray.

According to definition, when a beam of light appears to meet at a point, after reflection, from a mirror then the image formed is known as virtual image. It cannot be obtained on a screen.

According to definition, the perpendicular drawn to the surface of the mirror at the point of incidence is known as normal ray.

Plane mirror shows lateral inversion. Left appears right and right appears left.

When a mirror forms an image, the left and right sides of the image are interchanged. This phenomenon is called lateral inversion as the image is laterally inverted.

Light can pass through transparent materials, such as glass or air. However it cannot pass through opaque materials and get reflected.

If the image always appears erect, then the mirror is either plane or convex. So, on the basis of the given options, the mirror is likely to be a plane mirror.

According to definition, 
i) A ray from the object, travelling towards the mirror is the incident ray.
ii) Angle between reflected ray and normal is the angle of reflection.
iii) The angle between reflecting surface and the reflected ray is known as the glancing angle of reflection.

According to definition of reflected ray and point of incidence, the ray which bounces off the surface of the mirror when the incident ray strikes the mirror is known as the reflected ray. The point at which incident ray meets the mirror is called the point of incidence.

Angle of incidence $+$ Glancing angle of incidence $=90^0$

Angle of incidence $+$ glancing angle of incidence $=90^0$

Objects are visible to the eye when light strikes the surface and reflects back itself into the eye. Opaque objects show this phenomenon.

Angle of incidence    $i = 35$ degrees

When a light ray falls on a perfectly reflective mirror at some angle, then only the direction of the light rays changes such that the angle of incidence is equal to the angle of reflection but the frequency, wavelength, time period and the velocity of the light remain constant.

The back of a mirror is usually covered with some sort of darkly colored, protective material to stop the silver coating from getting scratched, and also to reduce the risk of any light seeping through from behind. Silver reflects light better than almost anything else and that's because it gives off almost as many light as fall on it in the first place.

For minimum width -

According to definition, ratio of the amount of light reflected from a surface to the amount of light falling on the surface is called reflectance.

Angle of incidence is the angle between incident ray and normal to the reflecting surface at the point of incidence.

When light rays traveling from one medium fall at the surface of another medium part of the light rays returns back to the same medium.
For example in window mirror we can see our image and we can also see outside objects because of both reflection and refraction of light.