I need step by steps with these questions. 1. Difference between convering and d

Question

I need step by steps with these questions.

1. Difference between convering and diverging lenses?

2. Given f=+12cm, calculate di, L, and m when do is a. 36cm, b. 24cm, c. 18cm ( Note: a and c are conjugate focal positions) (di=image distance and do=object distance)

3. Is do larger or smaller than di when you have a real magnified image?

4. When you use a converging lens as a simple magnifier, what distance is the approximate focal length of the lens?

5. A converging (lens f=+12cm) in contact with a diverging lens gives a combined focal length of +36cm. Calculate the focal length of the diverging lens.

Explanation / Answer

(1) Difference between converging and diverging lenses

(i) As their name suggest converging lens converge the light rays which comes from the light source

And diverging lens diverge these rays

(ii) Focal length of converging lens is positive

and focal length of diverging lens is negative

(iii) Image formed by converging lens is real when object is beyond focal point and virtual when object is between pole and focal point

Image formed by diverging lens is Virtual, upright and diminished in size

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