Mell What microscope uses two or more glass lenses?
Compound microscopes
Compound microscopes use two or more lenses in a row to magnify objects for viewing. In general, compound microscopes require that the specimen to be viewed is thin enough or transparent enough that light can pass through.
Who was the first scientist describe living cells as seen through simple microscope?
Anton Van Leeuwenhoek was the first person to observe living cells. In 1675, he saw a single celled organism in a drop of pond water. These living things were microscopic and could not be seen without a microscope.
Which scientist observed that cork was composed of tiny hollow boxes that he called cells?
Hooke made the drawing in Figure below to show what he saw. As you can see, the cork was made up of many tiny units, which Hooke called cells. Cork Cells. This is what Robert Hooke saw when he looked at a thin slice of cork under his microscope.
What objective lens can be used in observing the entire structure of an animal and plant cells?
Answer Expert Verified To see the whole structure of the specimen you should focus your microscope with the lowest power objective lens which means 4x.
Where is nucleus located in a cell?
The nucleus is one of the most obvious parts of the cell when you look at a picture of the cell. It’s in the middle of the cell, and the nucleus contains all of the cell’s chromosomes, which encode the genetic material.
How are multifocal glasses used for distance vision?
Multifocal glasses correct both near and distance vision — all in the same lens. One portion is focused for distance vision, while the other portion is used for up close activities such as reading. Single-vision lenses are worn by people with various types of focusing problems.
What are the lenses in medical glasses used for?
The lenses are used in many things , They are used in the medical eye glasses either for reading or walking , They are used in the wars , the leaders use the binoculars to follow the battles .
Why does the ocular lens act as a magnifying glass?
The ocular lens is closer to the new image than its focal length, causing it to act as a magnifying glass. Since the final image is just a multiple of the size of the first image, the final magnification is a product of both magnifications from each lens.
Which is the unit of measure of the power of a lens?
lens: an object, usually made of glass, that focuses or defocuses the light that passes through it diopter: a unit of measure of the power of a lens or mirror, equal to the reciprocal of its focal length in meters. Myopia is diagnosed and measured in diopters convex: curved or bowed outward like the outside of a bowl or sphere or circle