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Question 5 Which property of laser light is NOT correctly defined/described? extremely bright: high power at one wavelength monochromatic: emits one wavelength of light collimated: parallel rays of light polarized: electric field oscillates between two perpendicular planes

Please answer both questions

How does the light compound microscope magnify an object? Outline the process

During this practical, we will be measuring the absorbance of Bromocresol green combined with albumin using a spectrophotometer. At what wavelength will we make this measurement?Question 3 Select one:a.320 nmb.400 nmc.628 nmd. 595 nme. 511 nm

A protein’s concentration can be determined spectrophotometrically by mixing it with an indicator called a Bradford reagent and measuring the amount of light absorbed by the protein. Use the plot below to determine the mass of protein (in micrograms, μμg ) in 100.0 mL of the solution if its absorbance is 0.398. A.  52 B.  3.1 C.  2.4 D.  0.52 E.  0.031

Cathode Ray Discharge Tube Demonstration An Exploration (Because of the DANGER involved and the fragile nature of the device, this is a demonstration rather than a true Exploration) Background information: Until recently, almost all televisions used a device known as the cathode ray tube, or CRT, to display the images. In a cathode ray tube, the "cathode" is a heated filament (not unlike the filament in a normal light bulb). The heated filament is in a vacuum created inside a glass envelope or "tube." The "ray" is a stream of electrons that naturally pour off the heated cathode into the vacuum. The Cathode Ray Tube is powered by an extremely high voltage DC current system and is dangerous! Electrons are negative. The anode is positive, so the anode attracts the electrons pouring off the cathode. The electrons hit the phosphorus screen and generate green photons, which we can see. Safety: The cathode ray discharge tube is not a toy and should be handled with a lot of precaution. An…

What type of light is produced as a result of friction between certain crystals?   Question 20 options:   triboluminescence    fluorescence   electric discharge   bioluminescence      Previous PageNext Page

9. The LabQuest SpectroVis spectrophotometer is used to measure the intensity of a light source passing through a sample cell. If 41% of the light is absorbed by a solution, 59% of the light is transmitted. What is the value for absorbance (A)? 0.89 0.528 0.23 0.387

What is absorbance? Group of answer choices The amount of light not passing through a sample measured in units of M-1⋅cm-1. The amount of light passing through a sample measured in units of M-1. The amount of light passing through a sample measured in units of M-1⋅cm-1. The amount of light not passing through a sample measured in units of M-1. The amount of light not passing through a sample measured in units of J/s. The amount of light passing through a sample measured in units of J/s. The amount of light passing through a sample with dimensionless units. The amount of light not passing through a sample with dimensionless units.

Question 20 Which of the following is false? Lemons reflect large amounts of light from the red part of the spectrum. If the "red" cones are stimulated, the perceiver will see red. Cones, one kind of human photoreceptor, are used in color vision. The light reaching the eye from an object depends on its reflectance and the illuminant.

PLEASE show steps in your calculations

Why do we need to prepare a standard curve before we can use Beer's Law to determine the concentration of a solution? O We don't have to create a standard curve so long as we choose the appropriate wavelength. Because the standard curve tells us the absorbance of our sample Because the standard curve is used to determine the extinction coefficient Because the standard curve indicates what wavelength to set the spectrophotometer to