ICSE Class 9 Answered
An object is placed at a distance of 40 m from a concave mirror. It forms an image one fourth size of the object calculate the position of the image from the mirror also focal length of the mirror?
Asked by swapnilboss49 | 23 Feb, 2019, 07:26: PM
Expert Answer
Given u = 40 m
Magnification m = v/u =1/4
v = 40×1/4 = 10 cm
Using mirror formula
1/v +1/u = 1/f
Using with proper sign
1/f = -1/40 - 1/10
1/f = -50/400 = -1/8
So f = -8m
So focal length of the concave mirror = 8 m
Answered by Ankit K | 25 Feb, 2019, 09:23: AM
ICSE 9 - Physics
Asked by devatheerthaeh | 10 Aug, 2020, 09:58: PM
ANSWERED BY EXPERTICSE 9 - Physics
Asked by swapnilboss49 | 23 Feb, 2019, 07:26: PM
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