The distance of the object from a concave mirror of focal length 10cm so that image size is 4 times the size of the object will be a) 12.5 CMb) 10.0 CMc) 7.5 CMd) 15.0 CM

The distance of the object from a concave mirror of focal length 10cm

1.	The distance of the object from a concave mirror of focal length 10cm so that image size is 4 times the size of the object will be a) 12.5 CMb) 10.0 CMc) 7.5 CMd) 15.0 CM
Answer» (c) 7.5 cmExplanation:F = -10cmm = 4Using the RELATION:m = f/(f-u) 4= -10/(-10-u)-40-4u=-10-4u=-10+40u=30/(-4)u=-7.5 cm

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The distance of the object from a concave mirror of focal length 10cm so that image size is 4 times the size of the object will be a) 12.5 CMb) 10.0 CMc) 7.5 CMd) 15.0 CM​

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The distance of the object from a concave mirror of focal length 10cm so that image size is 4 times the size of the object will be a) 12.5 CMb) 10.0 CMc) 7.5 CMd) 15.0 CM