1. An object is kept at a distance of 20 cm from the pole of a concave

1.	1. An object is kept at a distance of 20 cm from the pole of a concave mirror of focal length 15 cm. Find the position and nature of image.
Answer» 1/F=1/v+1/u, here f= -15CM, u= -20cm, v=? , -1/15= 1/v+(-1/20) , -1/15+1/20=1/v , -4+3/60=1/v,. -1/60=1/v, v= -60cm, MAGNIFICATION= -v/u ,. m= -(-60)/-20, m= -3, if m is negative means image is inverted and REAL SIZE of image is larger than object

1. An object is kept at a distance of 20 cm from the pole of a concave mirror of focal length 15 cm. Find the position and nature of image.

Answer»

1/F=1/v+1/u, here f= -15CM, u= -20cm, v=? , -1/15= 1/v+(-1/20) , -1/15+1/20=1/v , -4+3/60=1/v,. -1/60=1/v, v= -60cm, MAGNIFICATION= -v/u ,. m= -(-60)/-20, m= -3, if m is negative means image is inverted and REAL SIZE of image is larger than object

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1. An object is kept at a distance of 20 cm from the pole of a concave mirror of focal length 15 cm. Find the position and nature of image.

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