A concave mirror has a focal length of 20cm. Find the position of an object for which the image size is double of the object size ?
Answers
Answered by
5
20cm*2=40.....
I am not sure that this my ans or not
I am not sure that this my ans or not
Satwik07:
I got the answer as 30cm but the correct answer given in my book is 10cm....?!
then u take 2*5
how can we take anything out of the given data ?
Answered by
7
Hi..
Ur answer is
Image can be virtual => m = 2,
v = - 2 u
1/-2u + 1/u = 1/-20
=> u = -10cm
image real, m = -2, v = 2 u
1/2u + 1/u = 1/-20
=> u = -30 cm
two positions
Hope this helps u!!
Ur answer is
Image can be virtual => m = 2,
v = - 2 u
1/-2u + 1/u = 1/-20
=> u = -10cm
image real, m = -2, v = 2 u
1/2u + 1/u = 1/-20
=> u = -30 cm
two positions
Hope this helps u!!
Yeah its correct
thanks
Pls mark d brainliest!!
yes done
thanks..
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