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State the type of mirror preferred asi. Rear view mirrors in vehiclesii. Shaving mirrors. Justify your answer giving two reasons in each case
(i) Convex mirrors are used as rearview mirrors.
The two reasons are given below:
1. They always formed a virtual and erect image of the object.
2. They have a wider field of view as they produce diminished size of the image.
(ii) Concave mirrors are used as shaving mirrors.
The two reasons are given below:
1. The image formed is magnified in size, which enables a person to see the minute details of the face in the mirror.
2. When the object is placed close to the mirror, the image formed is virtual and erect.
Explanation
A convex mirror, also known as a diverging mirror, as it is curved outward in the middle and when light strikes the reflective surface of the mirror, it diverges light rays. It always forms virtual, erect, and diminished images irrespective of the distance between the object and the mirror.
It is used in rearview mirrors of vehicles, shop security mirrors or traffic mirrors.
A concave mirror, also known as a converging mirror, as it is curved inward in the middle and when light strikes the reflective surface of the mirror, it converges light rays. Depending on the position of the object with respect to the mirror, the types of images it forms are real, inverted as well as virtual and erect image, also the size of the images formed are magnified, diminished as well as the same size as that of the object.
It is used in solar furnaces, torches, dentist mirrors, shaving and makeup mirrors.
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