QUE:
Arrow 2.5 cm high is placed at 25 cm from a diverging mirror of a focal lenght 20 cm . find the nature , position & size of that mirror .
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Answers
Answered by
1
Explanation:
H1 = +2.5cm
u = -25cm
f = +20cm
1/f = 1/v + 1/u
1/20 = 1/v -1/25
1/v = 1/20 + 1/25
1/v = 9/100
v = +11.11 cm
m = h2/h1 = -v/u
h2/2.5 = -11.11/-25
h2 = +1.11 cm
Hence the image will be formed at 11.11 cm behind the mirror, which will be virtual, erect and of 1.11cm size.
vishu71149:
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Answered by
1
HEY MATE HERE IS YOUR ANSWER....
h1=+2.5
u=-25
f=+20
1/f= 1/v-1/u
1/v=1/f-1/u
=1/20+1/25
1/v=9/100
v=+11.11cm
m=h2/h1=-v/u
h2/2.5=-11.11/25
h2=+1.11
THEREFOR, THE IMAGE WILL BE FORMED AT 11.11 cm behind the mirror, which will be virtual,erect and of 1.11cm in size.
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