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CBSE Class 8 Answered

an object is placed 10cm from a concave mirror . The focal length is 5 cm . Determine (a) the image distance (b) the magnification of image.
Asked by kavyalalala2005 | 29 Nov, 2018, 07:42: PM
answered-by-expert Expert Answer
we have mirror equation: begin mathsize 12px style 1 over v plus 1 over u space equals space 1 over f space end style ...................(1)
where v is image to mirror distance, u is object to mirror distance and f is focal length
 
begin mathsize 12px style 1 over v plus 1 over 10 space equals space 1 fifth space space space o r space space space v space equals space 10 space c m end style
magnification = -v/u = -10/10 = -1 ; image size is same size of object, real and inverted
Answered by Thiyagarajan K | 30 Nov, 2018, 07:55: AM
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