Question

The surface tension of film is t/l not t/2l why?​

Answer 1

Don't know. Sorry yaar. Next time.

Answer 2

Given that,

The surface tension of film is $\dfrac{t}{l}$ not $\dfrac{t}{2l}$

We know that,

Surface tension :

Surface tension is equal to the force divided by length.

For soap film,

There are two free surfaces of the film and surface tension acts on both of surfaces.

So, the total force is

$t=S\times 2l$

$S=\dfrac{t}{2l}$

Where, S = surface tension

t = force

l = length

Hence, The surface tension of film is $\dfrac{t}{2l}$

Learn more :

Topic : surface tension

https://brainly.in/question/683233