Question

Magnification created by the rear view mirror fitted in vehicles is
A. is less than one
B. is more than one
C. equals to one
D. can be more than or less than one depending upon the position of the object in front of it.

Answer 1

Hint: Magnification is the measure of the ability of a lens or other optical devices to magnify which is expressed as the ratio of the size of the image to that of the object. It is expressed as constant. That means the equation for the magnification is,
$m=\dfrac{v}{u}=\dfrac{{{h}_{i}}}{{{h}_{o}}}$

Complete step by step answer:
First of all let us discuss the rear view mirror in the vehicles. A rear-view mirror is a mirror which is a convex mirror in automobiles and other vehicles made to permit the driver to make visible rearward through the vehicle's rear window. If the magnification will be equal to 1 or more than 1 if the height of the image will be similar or greater than the height of the object. Therefore only a part of the image will be visible through the possible side of the mirror. This situation will not give the driver the clear idea of motion of vehicles. Therefore, the magnification developed by a rear view mirror fixed in vehicles is less than one.

So, the correct answer is “Option A”.

Note: In cars, the rear-view mirror is commonly fixed to the top of the windshield by permitting it to be adjusted to match the height and viewing angle of any driver and to stand without any harm out of the way if impacted by a vehicle when in collision. The rear-view mirror is made by one or more side-view mirrors which can be served as the only rear-vision mirrors on trucks, motorcycles and bicycles.