As a reverse DC voltage is applied across the diode, its capacitance varies. The higher the voltage, the less the capacitance. This is due to depletion layers of the diode junction, but we wont get into details here. This variable capacitor in conjunction with the stub, which is actually an inductor (coil) is the basis of our voltage controlled oscillator! As the voltage increases across D5, the frequency of oscillation increases.
Why is it important to center a specimen on low power before attempting on focus on it at high power? When you increase the magnification, you decrease the field of view. Usually, with parfocal microscopes, whatever is in the center of the original field of view is also visible at higher magnification, but if it was off to one side, you probably wouldn't see it at the higher magnification. 4. A student focus on a specimen at low power and carefully centers it before changing to high power.
Fiber Optic cabling is the other type of cabling solution we talked about. Fiber optics uses a glass or plastic core to transmit light between each connection. Because we are using light instead of an electrical current, fiber is immune electromagnetic to interference. Fiber is also able to send data at faster speeds and longer distances than copper cabling. Fiber is harder to work with and usually needs a specialized technician to install the connections.
If there are higher levels of potassium, then the resting membrane potential will be less than normal and an action potential will be not likely with the same amount stimulation. More voltage is needed. • Explain how hypokalemia will initially affect the resting membrane potential and the generation of an action potential. The resting membrane potential is based on the polarization of the cell. If there are lower levels of potassium, then the resting membrane potential will be higher than normal and an action potential will be more likely with less stimulation.
The results of my IAT concluded that I have a moderate automatic preference for light skin compared to dark skin. While taking the test, I knew the response that I wanted to put but because of the switching around I would accidently press the wrong letter. I guess in my mind I was trying to move fast while keeping up with the constant change. I feel as though the test should've given a little to no preference result for me. My impression of the IAT is that it may be accurate, but it really depends on the person taking it.
| Medium | Light travels at different speeds in different mediums, as they can be more or less dense. This means that the refraction and wave speed will be altered when it hits the lens. | Colour of light | Different colours of light have different wavelengths and frequencies causing them to refract different amounts at different focal points. | Material | Depending on the material depends on how much the light will refract, as if you used ice it would refract less increasing the focal length compared to glass as ice is less dense.
This may have entered the detector during the experiment, skewing the data. This is an experiment that needs to be performed in total darkness, but it was not possible due to the blinds not blocking out all of the sunlight and the computers being on throughout the experiment. A final cause of error may have been the yellow and green filters2. They have been inadequate, insufficiently blocking high frequency light. These unwelcome high energy photons would have ejected high energy electrons, allowing them to surpass the cathode-anode potential, which would have increased the measured stopping
In nearly all bulbs now, the filament is protected from oxidation with the outside by filling the bulb with different gasses or just by causing a vacuum inside the area around the filament. Usually the gas inside a bulb will be Argon as it does not react with other atoms as freely. Even though our atmosphere only contains around 21% Oxygen it would still cause the filament to oxidize and burn at a quicker rate, this would cause the filament to burn out in under three seconds. Incandescent light bulbs are made in a variety of different sizes, power, brightness and efficiency. Despite this filament bulbs still keep their title as a cheap, portable and quick to organize source of light available to nearly everybody who has access to electricity.
Theoretically the photocurrent is supposed to level off once the saturation voltage is reached. The saturation voltage is the voltage that, once reached, the photocurrent no longer increases significantly, even if the voltage is increased further. The saturation voltage was not reached during the experiment, possibly due to the inability to reach an intensity high enough such that the photocurrent could reach saturation. For the second part of the experiment, different filters were used to change the frequency of light shined on the phototube. For each respective frequency of light, the cutoff voltage was recorded.
With the progress in technology applications our exposure with electromagnetic fields, ionizing radiations goes on increasing the threshold limits. From the toxicologic and epidemiologic investigations on static and radiofrequency fields, various aspects of the radiations effects on health have been studied but cancer proved to be most attentive outcome from radiations exposure at high frequencies. These radiations produce significant environmental impacts. Inconsistency in research data and insufficient knowledge causes difficulties in the development of strategies and public health policies. Relevant to this, potential risks to individuals arise due to balancing benefits of technologies to the society.