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Question

Sir I am Shaun job of class 10 I have a doubt in physics on the topic of optics, this is the question Sir What is the field of view of a mirror, is it measured in terms of its area? How does a convex mirror create a wider field of view?how can we prove that a convex mirror creates a wider field of view? Thank you for your time Sir Shaun

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Solution

The field of view is the size of the largest object that can be seen through an optical system by a detector that is located at a fixed position. The size of the field can be expressed in units of length (such as meters), although it is more convenient to use an angular measure (e.g., degrees) in some situations. I think, field of view is clear now. A convex mirror, diverging mirror, or fish eye mirror is a curved mirror in which the reflective surface bulges toward the light source.Convex mirrors reflect light outwards, therefore they are not used to focus light. Such mirrors always form a virtual image, since the focal point (F) and the centre of curvature (2F) are both imaginary points "inside" the mirror, that cannot be reached. As a result, images formed by these mirrors cannot be projected on a screen, since the image is inside the mirror. Convex mirror show a very large area because they collect a large amount of light in a small space to form an upright and diminished image. The image is smaller than the object, but gets larger as the object approaches the mirror.Since tue imahe formed is small, it can cover large area. Thys why , convex mirror is used in vehicles to view the behiclve behind. This is the proof .There is analytical proof , but it is not in your scope.You will study it in higher class. Thanks.

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