Question

हाय! और उफ़! से कोई शब्द​

Answer 1

Answer:

हाय ! केसे हो और उफ ! ये क्या हो गया है

Answer 2

Answer:

Let the focal lengths of the two lenses be f

1

and f

2

.

u

1

=OC

1

and

v

1

=I

1

C

1

u

2

=−C

1

I

1

which is approximately equal to C

2

I

1

and

v

2

=C

2

I which is approximately equal to C

1

I

∴

u

1

1

+

v

1

1

=

f

1

1

and

u

2

1

+

v

2

1

=

f

2

1

OC

1

1

+

I

1

C

1

1

=

f1

1

and

−C

1

I

1

1

+

C

1

I

1

=

f

2

1

So

OC

1

1

+

I

1

C

1

1

=

f

1

1

+

f

2

1

=

F

1

.

Combined focal length of two thin lenses in contact is given by:

F=

f

1

+f

2

f

1

f

2