Question

Two thin lens of power 15D and -5D are in contact with each other forming a combination lens.
(a) What is the focal length of the combination?
(b) An object of size 3cm is placed at 30 cm from this combination of lenses. Calculate the position and size of the image formed.

Answer 1

Explanation:

I can solve only question (a) sorry.....

Answer 2

Answer:

CHEMISTRY

A solution is defined as a:

A .

Homogeneous mixture of two or more substances

B .

Heterogeneous mixture of two or more substances

C .

Homogeneous mixture of liquid and solid components only

D .

Homogeneous mixture consisting of water as one of the components

A solution is a homogeneous mixture of two or more substances. A solution may exist in any phase. 

A solution consists of a solute and a solvent. 

The solute is the substance that is dissolved in the solvent.

For example, in a saline solution, salt is the solute dissolved in water as the solvent.