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What is the first lens in a refractor called?
The first lens that the light energy passes through on its way through the telescope is called the object lens or the objective. It is the most important and the most expensive part of the telescope. Telescopes are graded by the diameter of the object lens.
Which part of a light microscope would most likely be damaged if the coarse adjustment is improperly used while a specimen is being observed under high power?
The high powered lens could be damaged. Also, the slide can be broken.
What are the magnifications on the objective lenses?
There are many different microscopes currently on the market. Most of these microscopes come with different levels of magnification so that you can view an object in different ways. It is important to make sure the microscope you choose to use will have the correct maginfication you need.
Which of the objectives comes closest to a specimen and is most likely to break a slide if proper precautions are not taken?
The high power objective lense will most likely break the slide. You need to use coarse adjustment on the low power objective lens.
Which structure is used to focus light in a reflecting telescope?
A refracting telescope uses a lens (or for most refractors today, 2 or more lenses) to bend the wavelengths of visible light to a focal point as a means of collecting light. The light is then focused using an eyepiece. Depending on the focal length of the eyepiece, the effective magnification of a telescope can be altered.
What objective on the microscope requires the most light?
scanning
What is the first lens in a refractor called?
The first lens that the light energy passes through on its way through the telescope is called the object lens or the objective. It is the most important and the most expensive part of the telescope. Telescopes are graded by the diameter of the object lens.
What are the Characteristics of Lens?
The lens focuses light on the retina.
What refracts most of the light entering the eye?
LENS
Where do you find the scanning power objective on a microscope?
The scanning power objective relates to the objective lens. Most microscopes provide two or more objective lenses to give a choice of magnification power. Some also include an oil immersion lens for even greater magnification.
What is the most commonly used objectives?
The most commonly used objective lens, especially in Biology, is oil. This is because oil, unlike other liquids like water, has very little light refraction.
Which part of a light microscope would most likely be damaged if the coarse adjustment is improperly used while a specimen is being observed under high power?
The high powered lens could be damaged. Also, the slide can be broken.
In microbiology what is the most commonly used objective explain?
The microscope because you're working with small bacteria that is too small to see with the naked eye
What microscope objective is best to study bacteria?
The most satisfactory way to study bacterial morphology 40x objective.
What is the maximum magnification of the dark-field microscope?
Most go up to 1000x as it is light field microscopy. The ocular lens (the one that you look into) is 10x, but there are different objectives to focus on the specimen that you rotate to chose. The lowest is usually 4x, then 10x, 40x, and then 100x. Multiply ocular lens (10x) X objective lens you are using (ex: 40x) = Total 400x Oil immersion drop is used ONLY on the 100x objective.
Does a telescope use a convex lens?
Reflecting telescopes don't use lenses - they use mirrors (hence 'reflecting'). Light goes in the top, hits a concave mirror at the bottom of the tube which makes the light converge when it is reflected, then bounces back up to the top where it hits a smaller secondary mirror, where it is directed down the eyepiece. Do you mean refracting telescopes? If so then these do use lenses, the amount depends on the telescope. The most simple form has an objective lens which focuses the light, and then an eyepiece which has a lens in it to magnify the image. The objective lens is convex on the side pointing out of the telescope, and is flat on the other side.
What part of the eye is Light sensitive?
The retina at the back of the eye is light-sensitive
