an object kept in front of concave mirror of focal length 20cm the images is 3 times the size of the object . calculate 2
.an object is kept in front of the concave mirror of focal length 20cm the image is three times as a site
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Answered by
2
The object distance is 13.3 ( 3 is the magnification) m= f/ f+u
Halemm:
By this you get object distance..then by using mirror formula you can calculate image distance
Answered by
5
f=20cm
m=3=v/u
1/v + 1/u =1/f
v=3u
1/3u + 1/u= 1/20
solve and you get u=80/3
v=3u
therefore v =80
m=3=v/u
1/v + 1/u =1/f
v=3u
1/3u + 1/u= 1/20
solve and you get u=80/3
v=3u
therefore v =80
Focal length -ve
U is also - ve
So u will be -10 right?
hmm yeah messed that up
m = -(v/u)
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