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CASE STUDY : Light is a form of energy which induced sensation of vision to our eyes. It becomes visible when it bounces off on surface and hits our eyes. Regular reflection takes place through a smooth polished surface. The mirror outside the driver side of the vehicle is usually a spherical mirror and printed on such mirror is usually the warning "Vehicles in this mirror are closer than they appear". (i) What is the reason for this warning written on the mirror ? (ii) Draw a ray diagram showing the image formation in such kind of mirror. (iii) State two positions in which a concave mirror produces a magnified image of a given object. (iv) How is linear magnification it related to object distance and image distance ?
Asked by susrisangita792 | 23 Jul, 2023, 09:13: AM
Part (i)

Mirror outside the driver side of vehicle has the warning message " vechiles appear closer in this mirror than the real distance " .

Above mentioned warning messgage is printed in the mirror because the mirror is of convex type.  Unlike plane mirror , image distance from mirror is less than the object distance from mirror.

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Part (ii)

Ray diagram for image formation in convex mirror is given above. In above diagram C is centre of curvature and F is focal point.

Ray which is parallel to principle axis reflected back so that it appears that ray has emerging from focal point as shown in figure.

Ray which has direction towards the centre of curvature is retaced back after reflection form convex mirror.

Point of meeting of these extended rays is the point of image formation as shown in figure.

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Part (iii)

When object is between Focal point F and centre of curvature of concave mirror, we get magnified real inverted image.

When object is in between focal point F and optical centre of concave mirror , we get magnified virtual non-inverted image.

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Part (iv)

magnification = v/ u , where v is mirror-to-image distance and u is mirror-to-object distance.
Answered by Thiyagarajan K | 23 Jul, 2023, 11:12: AM

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