A concave mirror produces three times magnified real image of an object placed at 7 cm in front of it. Where is the image located? (Ans: 21 cm in front of the mirror)
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Since the image formation by a concave mirror is real and magnified, the formula of magnification is,
m=-3(Since the image is real)
u=-7 cm(in front of the mirror)
Applying formula of magnification in a concave mirror, m=-v/u,
Where,
m=magnification by a concave mirror,
u= distance of the object from the mirror
v=distance of the image from the mirror
m=-v/u, -3=v/-7 v=-3*-7 v=21 cm
The image formation by a concave mirror is 21 cm in front of the mirror.
m=-3(Since the image is real)
u=-7 cm(in front of the mirror)
Applying formula of magnification in a concave mirror, m=-v/u,
Where,
m=magnification by a concave mirror,
u= distance of the object from the mirror
v=distance of the image from the mirror
m=-v/u, -3=v/-7 v=-3*-7 v=21 cm
The image formation by a concave mirror is 21 cm in front of the mirror.
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