A person looks at her image in a spiny spherical decoration when her face is 30cm from the surface of the decoration.The diameter of the decoration is 20cm.Find the position of the image
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Explanation:
The only mirror that forms the magnified virtual image is the concave mirror.
m= -v/u = 2 = v= -2u
And, u = -20cm
1/v + 1/u = 1/F
1/40 + -1/20 = 1/F
f = -40cm
Hence, radius of curvature is R = 2f = 80cm and the mirror is concave.
Answered by
0
Answer:
Answer
The only mirror that forms the magnified
virtual image is the concave mirror.
m = -v/ u = 2 = v = -2u
And, u = -20cm
1/ v + 1/ u = 1/ F
1/40 + -1/20 = 1/ F
f = -40cm
Hence, radius of curvature is R = 2f = 80cm
and the mirror is concave.
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