A concave mirror has a magnification of -2.5 if its focal length is 20 cm find its image and object position?
Asked by ajajaysanja | 23rd Oct, 2019, 11:00: AM
m =-2.5 cm
f =-20 cm
The linear magnification of mirror is given as
This means object distance is 28 cm and the negative sign indicates that the image is formed to the left side of the mirror.
Now, substituting the value of u in equation (1), we get,
v = 2.5 × (-28 cm)
v = - 70 cm
Thus, image distance is 70 cm and the negative sign indicates that the image is also formed to the left side of the mirror.
Answered by Shiwani Sawant | 23rd Oct, 2019, 12:19: PM
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