Which letter on the figure below represents the light intensity control?

Q: What is the purpose of the iris diaphragm? Select an answer. a. To provide light for illumination b.…

A: MICROSCOPE It is an instrument used to see objects that are too small to be seen by the naked eye.…

Q: When you increase magnification, what happens to field of view?

A: Magnification- Magnification is that the ability of a microscope to provide a picture of an object…

Q: Which color has largest wavelength?

A: The sun releases light energy that has three main components: ultraviolet radiation, visible light,…

Q: numerator and denominator mean in the visual acuity chart

A: Visual Acuity Test It is a series of diagnostic techniques used in the examination of eyes, the…

Q: Match the following items: [4] 1.     540 nm A.    Wavescan 2.     Quantity of light of a specific…

A: The absorbance of a solution of a biological molecule is determined by Lambert-Beer law. The law…

Q: When you view a close object, your lens gets_____ . a. flatter c. darker b. rounder d. cloudier

A: ACCOMODATION The process of focusing on a nearby object causes 3 processes -  Convergence of eyes…

Q: OIL EMERSION IS REQUIRED FOR which lens

A: Oil immersion is a technique which is used to increase the resolving power of a microscope. A light…

Q: Resolution is __________ with a longer wavelength of light.a. improved. c. not changedb. worsened.…

A: How well a microscope works is determined by the resolution of a microscope. Resolution may be…

Q: If we used the 365nm setting on the UV light box would this have caused more or less UV light…

A: Ultraviolet light cause health issue as it is associated with DNA damage and skin cancer. Sunlight…

Q: Select ALL the correctly matched terms: a. Immersion oil/ Oil with a different refrative index than…

A: diffraction is a physical phenomenon in which the light waves bend when meet with an obstacle like a…

Q: f we used the 365nm setting on the UV light box would this have caused more or less UV light damage

A: Long-wave UV light (315 nm–400 nm) is an easily accessible and commonly used energy source for…

Q: Explain the low-angle rotary shadowing.

A: Rotary Shadowing : It allows high contrast visualization of of both individual macromolecules and…

Q: What color of light results from the addition of cyan light and red light? green blue white magenta

A: Green, blue and red are primary colours. When these colours are mixed in different proportions new…

Q: What is working distance and how is it related to magnification?

A: Working distance is the distance between the object and the front end of the lens. A microscope has…

Q: For dispersion of light through a prism which colour has maximum deviation?

A: A glass prism is a transparent material with flat polished surfaces that refract light. A dispersive…

Q: Calculate absorbance if only half of the incident light is transmitted.

A: Spectrophotometery is a technique used to determine the concentration of any substance inside the…

Q: Why is it difficult to see colors in dim light?

A: The back portion of the eye that responds to light is called the retina. This is carried out with…

Q: What could cause deviations in scores, for color hue tests? Besides change in light

A: Farnsworth-Munsell Color Hue Vision Test is one of the most common tests performed to check the…

Q: Indicate how the resolving power is determined and howresolution affects image visibility.

A: Resolving power of a microscope is the reciprocal of the minimum distance at which two different…

Q: If an object appears red, which of the following light colors is transmitted or reflected (NOT…

A: Absorbance is the amount of light absorbed by the object. The amount of light that is transmitted by…

Q: True or false light can bounce off of things , be bent , and be absorbed?

A: Light is defined as an electromagnetic wave or radiation. In other words, light can also be referred…

Q: What is the function of cyclic GMP in photoreceptors?

A: Cyclic GMP is a cyclic nucleotide derived from guanosine triphosphate. it acts as a second messenger…

Q: What could potentially happen if you leave the slide exposed for too long to the open flame? Why do…

A: If the slide is overheated the cell wall of the smear will be ruptured . Concentration and freshness…

Q: What are the two things that can be done to improve contrast?

A: Contrast refers to the darkness of the background relative to the specimen.

Q: Explain the Workings of an oil immersion lens.

A: Oil immersion lens: A type of objective lens that can focus when there is a drop of liquid (such as…

Q: What does the objective lens magnify

A: There are two types of lenses- 1. Objective lens- The lens near the specimen is called the objective…

Q: Beer's law states that: The amount of light absorbed is indirectly proportional to its concentration…

A: Beer Lambert's law is also known as Beer's law. It is used to find the concentration of the given…

Q: how do you think increasing the index of refraction will change the path of the light ?

A: Light rays travel through different medium. During this travel they either get reflected(bouncing of…

Q: The pupil of a person's eye changes from a diameter of 3.5 mm to 1.5 mm as the illumination is…

A: During dim light, the size of the pupil expands so that more light enters our eye and it helps to…

Q: If you travel north from the equator, what generally happens to the intensity of ultraviolet light?

A: The intensity of UV ray coming from sun depends on the angle of elevation. The angle of elevation of…

Q: ? which device is used for refraction A direct ophthalmoscope .B retinoscope .C slitlamp .D…

A: According to the question, we have to find out which of the following device is used for refraction.…

Q: When light strikes photoreceptors, what takes place?

A: Introduction Photoreceptor are specialized neurons found in retina, Which convert light energy in to…

Q: Do I use a bar graph, line graph or another type of graph to display light exposure to plants and…

A: A graph or chart or diagram is a diagrammatical illustration of a set of data. If the graph is…

Q: What did you notice happening to the field of vision as you increased the magnification of a light…

A: The light microscope is regularly used in biology lab that gives us about the general structure of a…

Q: regarding the slit lamp .A it uses diffuse illumination only .B

A: A slit lamp is kind of instrument that consist a high-intensity light source that can be focused to…

Q: While viewing an object under low power you see a small organism at the edge of the field of vision.…

A: Step 1 Microscopes are the instrument used for observing smaller objects as well as finer internal…

Q: What is photoreceptors?

A: Receptors are chemical structures made up of proteins that collect and send signals that can be…

Q: In absorption spectrophotometry: a. Absorbance is directly proportional to transmittance b. Percent…

A: Atomic absorption spectroscopy (AAS) depends on the rule that free molecules in the ground state can…

Q: What occurs during phototransduction of light?

A: The process by which light's primary particles called the photons are converted into the electrical…

Q: What is the frequency of green light that has a wavelength of 531 nm? (c = 3.00 x 10⁸ m/s

A: Given in the question:  Wavelength = 531 nm c = 3 ×108 To find  frequency  , we need to know…

Q: A solution containing 2g/liter of a light-absorbance substance in 1 cm cuvette transmits 75% of…

A: Introduction Using the Beer-Lambert law,  logI∘I=A=aclwhere, I∘ is the Incident light, I is the…

Q: What is Magnification?

A: The instrument microscope aims at visualizing the magnified view of the objects/organisms that are…

Q: Which light source will provide you with greater resolution than green light, blue or red light?…

A: The resolution is defined as the smallest distance between two molecules or substances that can be…

Q: 2. Construct a unit concept map to show the relationships among the following set of terms. Include…

A: A microscope is a laboratory instrument to examine the objects that are too small to view through…

Q: Adding white to a hue creates a ____ while adding black to the same hue creates a _____. A.…

A: Hue The dominating color family is referred to as hue. Hues include primary and secondary colors…

Q: Name the colors in a color spectrum of visible light from low to high wavelength.

A: The visible spectrum is the portion of the electromagnetic spectrum which is visible to the human…

Q: If you have a transparent or thin specimen, do you need to open or close the iris diaphragm? As…

A: Shutting the iris diaphragm will decrease the measure of enlightenment of the specimen yet expands…

Q: Which part of the human eye provides most of the refraction for the light raysentering the eye?

A: Sight is a very important sense, made possible by the eyes. The vertebrate eye is a very complex…