Question

what do F2, 2F, 2F2 represent?​

Answer 1

Answer:

It is because that a lens have 2 foci. 2F1 and 2F2 are the centre of curvatures, i.e the center of the sphere. The lens have 2 center of curvatures because the lens are bound to have 2 spheres. Hope this helped!!

Answer 2

The following are the answers to the above question are -

• F₂ represents that the fluorine is in a molecular state. Two atoms of fluorine react together in a suitable condition to form the molecule. They are stable.
• 2F represents that there are two atoms of fluorine present. The fluorine atom does not form any bond, they are present in the atmosphere in an unbound form, and are highly reactive. They are not stable, and will react with the surrounding atoms.
• 2F₂ represents that there are two moles of fluorine molecules are present in the atmosphere. They are very stable.