The focal length of a concave mirror is 10 cm, where should an object of length 4 cm be placed so that an image of magnification-1 is founded.
a. 10 cm
b. 20 cm
c. 30 cm
d. 40 cm
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Wherer should and object be placed in front of this concave mirror so as too obtain an image which is real, inverted and same size as the object ? Thus, the object should be placed at a distance of 20 cm in front of this concave mirror
Explanation:
it will use
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