## A point object is placed at distance of 30 cm from a convex

The picture of a convex mirror is virtual and upright in comparison to the object, as seen in the ray diagram. A convex mirror is a form of mirror that is used for protection in stores and is also seen on the passenger side of many automobiles (“Objects in mirror are closer than they appear.”). A convex mirror will reflect a series of parallel rays in all directions; conversely, it will take light from all directions and reflect it in one direction, as seen in shops and vehicles.
Drawing a ray diagram is an excellent way to get a rough understanding of how large an object’s image is and where it is located. We may also use something called the mirror equation to determine these things precisely. In section 25.6 of the textbook, the geometry of adjacent triangles is used to derive this equation.
The height of the image usually varies from the height of the object, indicating that the mirror has magnified the image (or reducing). The magnification, m, is defined as the ratio of image height to object height, which is inversely proportional to the image distance to object distance:

## Concave mirror – focal point | reflection and refraction | don

A microscope is a piece of equipment that magnifies tiny items. Some microscopes can also see the outline of a cell, its nucleus, mitochondria, and other organelles at the cellular level, enabling scientists to see the shape of a cell, its nucleus, mitochondria, and other organelles. Although a modern microscope has many components, the lenses are the most important. The picture of an object may be magnified and examined in depth using the microscope’s lenses. A convex lens, which has both sides curved outwards, is used in a simple light microscope to control how light reaches the eye. Light bends towards the eye as it bounces off of an object under the microscope and passes through the lens. This makes the object appear larger than it is.
Throughout the history of the microscope, technical advancements have made it easier to use and improved the quality of the images created. In 1590, Dutch spectacle makers Zacharias and Hans Jansen invented the compound microscope, which has at least two lenses. A Dutchman named Antoine Van Leeuwenhoek also produced some of the first microscopes. A small glass ball was placed within a metal frame in Leeuwenhoek’s microscopes. He became well-known for using his microscopes to study single-celled microorganisms found in freshwater, which he dubbed “animalcules.”

### Calibration of microscopic ocular micrometer

The shortest distance between two points on a specimen that can still be distinguished by the observer or camera system as separate entities is known as the resolution of an optical microscope. Figure 1 shows point sources of light from a specimen appearing as Airy diffraction patterns in the microscope intermediate image plane, as an example of this important concept.
The ability of a microscope objective to differentiate between two closely spaced Airy disks in a diffraction pattern is referred to as its limit of resolution (noted in the figure). The point spread function is a three-dimensional representation of the diffraction pattern near the intermediate image plane, as seen in the lower portion of Figure 1. The specimen image is depicted in two and three dimensions and is made up of a collection of closely spaced point light sources that form Airy patterns.
In optical microscopy, resolution is a very subjective value since an image can appear unsharp at high magnification but still be resolved to the objective’s full potential. The numerical aperture of the substage condenser determines the resolving power of an objective, but it also determines the overall resolution of the entire microscope optical train. The greater the resolution, the higher the total system’s numerical aperture.

### An object is placed at a distance of 40 cm from a convex mirror

be thoroughly explored and used to test specimens APPLICATIONS OF THE MICROSCOPE to familiarize yourself with the: 1.Brightfield microscopy theoretical concepts 2. Components of a compound microscope. 3.Compound microscope operation and maintenance. 4.Application of the compound microscope in the field for the visualization of
Turn the coarse focus knob to bring the stage as close to the lens as it can get without touching the lens when watching from the side to ensure the lens does not contact the specimen. (Whenever you pass a specimen through an objective lens, keep an eye out from the side to make sure the lens doesn’t crash through the specimen and cause damage!) 3. Bring the specimen into sharp focus when looking through the ocular lens. 4. If this is your first specimen of the day, now is the time to Kohler your microscope (while it is in focus). If your microscope has already been Kohlered, there is no need to do it again. 5. Use the light source to change the light source on a regular basis.