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How the equation of concave mirror U=-2f came as in concave mirror u and f are-ve

 

Asked by vijaygireesh 27th April 2020, 10:18 PM
Answered by Expert
Answer:
In a problem related concave mirror, if it is stated that u = -2f , then object is placed at centre of curvature .
 
For concave mirror the distance of radius of curvature equals twice the focal length.
 
As per cartesian sign convention, object is placed at left side of mirror and the
 
distance measured from pole of mirror towards left is considered to have negative sign
 
Answered by Expert 28th April 2020, 12:18 PM
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