Optical Instrument: Simple Microscope
### Magnifying Power (Normal Adjustment)
$$M=\frac{D}{f}$$
### Magnifying Power (Final Image at Near Point)
$$M=1+\frac{D}{f}$$
### Terminologies
- M → Magnifying power.
- D → Least distance of distinct vision.
- f → Focal length.
### Usage
- Used in microscope magnification problems.