Physics, asked by thedemigoddess, 1 year ago

A person who cannot see objects nearer than 1 m wants to read a book placed at 25 cm . Find the power of lens . Pls show working.

Answers

Answered by Gourav2002
2
u= -25
v= -100
f= ?
1/v - 1/u = 1/f
(1/-100) -(1/-25)=1/f
((-1+4)/100)=1/f
3/100 =1/f
f =3.33 cm

P = 1/f
p= 1/3.33
p = 3 dioptre

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note; sorry, answer in photo is wrong
Attachments:

thedemigoddess: Achha 1/3.33= 3 D kaise ho gaya?
Gourav2002: d to uski unit h
Gourav2002: Vese Ye Ncert book ka question h
thedemigoddess: Arre main ye nhi bol rhi
thedemigoddess: Mai sum solve karne ki baat keh rhi hoon
Gourav2002: 1/3.33333... = 3 hi hota h
thedemigoddess: Kya baat kar rha hai
thedemigoddess: Pehle nhi. BATA SKTA THA
thedemigoddess: Vese maine aapki ichha poori kar di
Gourav2002: thanks
Answered by anurag109
0
convex lens used in this case

thedemigoddess: Itna time laga sirf ye likhne mein
Gourav2002: sorry Mera answer galat h m use change kr deta hu
anurag109: haan laga itna time to
anurag109: kya hua
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