An object is held at 30 cm in front of a convex mirror of focal length 15 cm. At how much distance a plane mirror should be placed from the convex mirror so that the image formed in the two mirrors coincide each other.
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u = -30cm
f = -15cm
1/f = 1/v + 1/u
-1/15 + 1/30 = 1/v
-2/30+1/30 = 1/v
-1/30 = 1/v
v = -30cm
AnshumanNandan:
And answer the second part also
Plz
1/15 = 1/v - 1/30
1/15 + 1/30 = 1/v
2/30+1/30 = 1/v
3/30 = 1/v
1/10 = 1/v
v = 10cm
2nd part brother
sorry....... i was unable to answer the question plzzzzz sorry......again
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