Which of the following is NOT equal to 1 millimeter?

Answer: Only option a) i.e. 100 cm is not equivalent to 1 mm.

Which of the following places the steps of the Gram stain in the correct order 1 alcohol acetone?

Place the steps of the Gram stain in the correct order: 1-Alcohol-acetone; 2-Crystal violet; 3-Safranin; 4-Iodine. Which of the following pairs is mismatched? A) To remove the simple stain.

What microscope uses visible light?

optical microscope
The optical microscope, often referred to as the “light optical microscope,” is a type of microscope that uses visible light and a system of lenses to magnify images of small samples.

What structure does light pass through after leaving the specimen in a compound light microscope?

condenser lens
Light from the illuminator passes up through condenser lens (located below the stage), which focuses all of the light rays on the specimen to maximize illumination.

Which is the correct order for the Gram stain?

The stains are applied to a smear of bacteria on a microscope slide in the following order: crystal violet, Gram’s iodine, decolorizing agent, and safranin.

What are the steps of the Gram stain in the correct order?

The performance of the Gram Stain on any sample requires four basic steps that include applying a primary stain (crystal violet) to a heat-fixed smear, followed by the addition of a mordant (Gram’s Iodine), rapid decolorization with alcohol, acetone, or a mixture of alcohol and acetone and lastly, counterstaining with …

Which part in a microscope does light pass through?

objective: ​the first lens light passes through after the specimen. The obective collects the light from the specimen and focusses it to a point inside the body tube. eyepiece: ​the lens light passes through before getting to your eye. The eyepiece magnifies the image formed by the objective so you can see your sample.

Which of the following is not associated with an electron microscope?

Which of the following is NOT associated with an electron microscope? scanning tunneling. Which of the following microscopes produces the highest resolution images? If a microbiology lab technician left the safranin out of the Gram stain procedure, what would be the result?

What does light pass through when using a light microscope?

Light traveling up from the mirror passes through the glass slide, specimen, and cover slip to the objective lens (the one closest to the object). This makes the first magnification: it works by spreading out light rays from the specimen so they appear to come from a bigger object.

What is microscope magnification?

Magnification is the ability of a microscope to produce an image of an object at a scale larger (or even smaller) than its actual size. … At the present time, magnification is well defined when viewing an image of a sample through the eyepieces of a microscope.

What are the different parts of a light microscope?

Lenses – form the image objective lens – gathers light from the specimen eyepiece – transmits and magnifies the image from the objective lens to your eye nosepiece – rotating mount that holds many objective lenses tube – holds the eyepiece at the proper distance from the objective lens and blocks out stray light.

Which microscope uses prism?

Interference microscopy uses a prism to split light into two slightly diverging beams that then pass through the specimen.

Which of the following is a lens found on electron microscopes but not on light microscopes?

Electrons have a smaller wavelength than visible light, leading to higher resolution. Which of the following is a lens found on electron microscopes but not on light microscopes? … They both employ the use of objective lenses.

Which microscope is for dissections?

stereo microscope
A dissecting microscope, also known as a stereo microscope, is used to perform dissection of a specimen or sample. It simply gives the person doing the dissection a magnified, 3-dimensional view of the specimen or sample so more fine details can be visualized.

What is inverted microscope used for?

Inverted microscopes are useful for observing living cells or organisms at the bottom of a large container (e.g., a tissue culture flask) under more natural conditions than on a glass slide, as is the case with a conventional microscope.

What is the prism formula?

The Prism Formula is as follows, The surface area of a prism = (2×BaseArea) +Lateral Surface Area. The volume of a prism =Base Area× Height.

What is a prism microscope?

The microscope body, viewing tube and stage are constructed of cast metal. … Light-gathering lucite prism provides sub-stage illumination, without the need for electricity, by using ambient or room light. 40x magnification is provided by a widefield 10x eyepiece and 4x objective.

How is fluorescence microscope inverted?

Are microscopes inverted?

Microscopes invert images which makes the picture appear to be upside down. The reason this happens is that microscopes use two lenses to help magnify the image. Some microscopes have additional magnification settings which will turn the image right-side-up.

Why is a fluorescence microscope inverted?

This is a reverse of the normal construction of a microscope, where the objective lenses are found above the stage while the condenser and the light source are below the stage. Hence the word, ‘inverted’.

What is fluorescent material?

Fluorescence is the emission of light by a substance that has absorbed light or other electromagnetic radiation. It is a form of luminescence. … Fluorescent materials cease to glow nearly immediately when the radiation source stops, unlike phosphorescent materials, which continue to emit light for some time after.

What are the differences between the inverted and upright microscopes?

An upright microscope focuses by moving the stage up and down. An inverted microscope has a fixed stage and the objectives move up and down to focus.

What is the magnification of an inverted microscope?

4x to 40x
From its invention to till now, the inverted microscope has built its popularity base in the scientific world. These microscopes give a lot better magnification than conventional ones. The range is 4x to 40x magnification which is an ideal magnification value for all biological specimens.