Question

Plz answer fast....Will be marking as brainliest​

Answer 1

Explanation: 2} 2f

Equivalent focal length in air,

F

1

1

=

f

1

+

f

1

=

f

2

When glycerin is filled inside, glycerin lens behaves like a diverging lens of focal length (-f)

⟹

F

2

1

=

f

1

+

f

1

−

f

1

=

f

1

⟹

F

2

F

1

=

2

1

Hope it helps