Question

A convexe lens of focal length
lens should an object
loom is placed at a distance from a wall, How far from
be placed so as to form it's real image on the wall?​

Answer 1

Answer:

=10cm,v=12cm,u=?

We know,

f

1

=

v

1

+

u

1

10

1

=

12

1

−

u

1

u=−60cm

∴The object must be placed at a distance 60cm in front of the lens.

Answer 2

${❥}\fbox\red{A}\fbox\orange{N}\fbox\purple{S}\fbox\green{W}\fbox\blue{E}\fbox\pink{R}$

Required answer-:

$\rightarrow$By mirror formula-:

$\frac{V}{1}$-$\frac{U}{1}$=$\frac{F}{1}$

Sign convection is distance from the center of the lens to be positive in one direction and negative in the other.

$\rightarrow$ $\frac{12}{1}$ -$\frac{U}{1}$=$\frac{10}{1}$

$\rightarrow$ $\frac{U}{1}$=$\frac{12}{1}$-$\frac{10}{1}$

$\rightarrow$$\frac{60}{1}$

$\rightarrow$The object to be place on side opposite to that of the wall at a distance of 60 cm from the lens.

❥___________________________________

PLEASE THANK MY EFFORTS

⬇️⬇️⬇️⬇️