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CBSE Class 10 Answered

distance cannot be negative, but according to new cartesian system the distance of object(since kept on left) is taken negative.why is it so?
Asked by satyarth agrahari | 03 Jan, 2013, 07:25: PM
answered-by-expert Expert Answer
The negative sign is taken just to signify that the distance to the object is measured in the direction opposite to that of light.
For eg., consider a number line. Lets assume that the mirror is placed at such a position that its pole lies at the zero point of the number line, object is placed on the negative side and light enters the lens from the negative side. Then in such a case the distance to the object (measurd from pole) is taken as negative.
Answered by | 04 Jan, 2013, 10:10: AM
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