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and nonmagnetic 5) Consider a Si solar cell. (a) if you do not have an antire flection coating on the surface of th...
Solar cells are given antireflection coatings to maximize their efficiency. Consider a silicon solar cell (n=3.50n=3.50)...
Solar cells are given antireflection coatings to maximize their efficiency. Consider a silicon solar cell (n=3.50n=3.50) coated with a layer of silicon dioxide (n=1.45n=1.45). What is the minimum coating thickness (but not zero) that will minimize the reflection at the wavelength of 698 nm where solar cells are most efficient?
Electromagnetism, Anti-reflection coating and Matlab. Use Matlab for part 2. Anti-reflection coating 1. Suppose you have...
Electromagnetism, Anti-reflection coating and Matlab.
Use Matlab for part 2.
Anti-reflection coating 1. Suppose you have a lens made of a material with refractive index n 1.8860. You wish to eliminate reflection for normally incident waves at ? 550 nm by using a quarter-wave coating. What thickness and permittivity would a coating need to have at this wavelength? 2. Now, consider the lens as a half space. Plot the magnitude of the reflection coefficient with this coating as a function...
Sunlight hits the solar cell below and three things happen: some light is reflected by the...
Sunlight hits the solar cell below and three things happen: some light is reflected by the solar cell; some light is converted to electrical energy; and the air around the solar cell heats up a bit. The energy flow diagram for the system that includes the sun and a photovoltaic (or solar) cell is shown below on the right A. Which form(s) of energy belong to the system? Note that Elight represents the light reflected by the solar cell. (Select...
Example use clements such as silicon to fabriceta solar odlls that will generite electricity wpodd to sunlight. Solar cells ure oñea costed with a thin trensparent 6im, such as sillicon monoxide...
Example use clements such as silicon to fabriceta solar odlls that will generite electricity wpodd to sunlight. Solar cells ure oñea costed with a thin trensparent 6im, such as sillicon monoxide monoxide for thist mimize relective loses. A silicon oel B - 3.5, is coated with s thin 6im of the fgur opdcal bosu of radisns shown, discuss whether each of the reflected beams will bave a phase change due to phase change wlpc boundaries showa. If a phase change...
5) A Si solar cell with junction cross sectional dimensions 2 cm ×2 cmis formed with Na 1018 cm3 on the p side and Nd 1018cm3 on the n side. It is operated at a temperature of 300 K and τn-tp-1 μ. a)...
5) A Si solar cell with junction cross sectional dimensions 2 cm ×2 cmis formed with Na 1018 cm3 on the p side and Nd 1018cm3 on the n side. It is operated at a temperature of 300 K and τn-tp-1 μ. a) Using the mobilities on the equation sheet, calculate the dark saturation current. b) An intrinsic region of thickness 200 μm is sandwiched between the p and n regions in order to enhance the active volume of the...
5. Solar panels have become a source of “Green” power. Those that directly convert sunlight into...
5. Solar panels have become a source of “Green” power. Those that directly convert sunlight into electricity are called photo-voltaic cells and use the photo-electric effect to generate their electricity. a. Classical wave theory stated that by increasing the intensity (amount) of light, that each electron would have more kinetic energy, however experiments showed that increasing the intensity increased the number of electrons released, but not the amount of energy each electron had. Why is this so? b. A photon...
2. When using the separatory funnel you may have observed a oily emulsion between the aqueous and...
2. When using the separatory funnel you may have observed a oily emulsion between the aqueous and DCM layers. What components of tea are responsible for this emulsion? How can one minimize the size of the emulsion layer? 3. How does adding the anhydrous sodium sulfate to the dichloromethane solution remove water? 4. If the above step was omitted in the isolation procedure, how would this be reflected in the yield of caffeine? 5. A student used 8.23 g of...
Problem 5: Consider the index of refraction n in the selected media at various wavelengths as shown...
Problem 5: Consider the index of
refraction n in the selected media at various wavelengths
as shown on the table.
Part (a) What is the ratio of the speed of red
light to violet light in diamond?
Numeric : A numeric value is
expected and not an expression.
vR/vV =
__________________________________________
Part (b) What is this ratio in polystyrene?
Numeric : A numeric value is
expected and not an expression.
vR/vV =
__________________________________________
Problem 6: A narrow beam of light
containing yellow (580 nm)...
Question 5: How would dust and oil on the glass plates affect the results? EXPERIMENT 10 THIN FILM I...
Question 5:
How would dust and oil on the glass plates affect the
results?
EXPERIMENT 10 THIN FILM INTERFERENCE Light from a monochromatic source is shined downward on two glass plates that are separated at one end by a hair. Light that is reflected from the top and bottom surfaces of the wedge-shaped thin film of air undergoes interference, and a series of dark and light lines are seen. By counting the number of dark or light lines over a...
Problem 24.1: please help!! Solar Thermal Energy 462 onsider a solur thermal elecinic plant built using a system of 2D...
Problem 24.1: please help!!
Solar Thermal Energy 462 onsider a solur thermal elecinic plant built using a system of 2D concentrators that reflect sunight to a system of pipes carrying molten salt with concentration C # 200. Example 24.5 2D Concentrator Efficiency Optimization Wher is the optimal efficiency poxsibie (essaming an onbient temperoture of 300 K and incident sunight u 1000 W/r)? Solving eq (24.23) un encany gives 818 K At this temperature. Cartot efficiency is approximately 63% and about...
Electromagnetism, Anti-reflection coating and Matlab.
Use Matlab for part 2.
Anti-reflection coating 1. Suppose you have a lens made of a material with refractive index n 1.8860. You wish to eliminate reflection for normally incident waves at ? 550 nm by using a quarter-wave coating. What thickness and permittivity would a coating need to have at this wavelength? 2. Now, consider the lens as a half space. Plot the magnitude of the reflection coefficient with this coating as a function...
Sunlight hits the solar cell below and three things happen: some light is reflected by the solar cell; some light is converted to electrical energy; and the air around the solar cell heats up a bit. The energy flow diagram for the system that includes the sun and a photovoltaic (or solar) cell is shown below on the right A. Which form(s) of energy belong to the system? Note that Elight represents the light reflected by the solar cell. (Select...
Example use clements such as silicon to fabriceta solar odlls that will generite electricity wpodd to sunlight. Solar cells ure oñea costed with a thin trensparent 6im, such as sillicon monoxide monoxide for thist mimize relective loses. A silicon oel B - 3.5, is coated with s thin 6im of the fgur opdcal bosu of radisns shown, discuss whether each of the reflected beams will bave a phase change due to phase change wlpc boundaries showa. If a phase change...
5) A Si solar cell with junction cross sectional dimensions 2 cm ×2 cmis formed with Na 1018 cm3 on the p side and Nd 1018cm3 on the n side. It is operated at a temperature of 300 K and τn-tp-1 μ. a) Using the mobilities on the equation sheet, calculate the dark saturation current. b) An intrinsic region of thickness 200 μm is sandwiched between the p and n regions in order to enhance the active volume of the...
5. Solar panels have become a source of “Green” power. Those that directly convert sunlight into electricity are called photo-voltaic cells and use the photo-electric effect to generate their electricity. a. Classical wave theory stated that by increasing the intensity (amount) of light, that each electron would have more kinetic energy, however experiments showed that increasing the intensity increased the number of electrons released, but not the amount of energy each electron had. Why is this so? b. A photon...
2. When using the separatory funnel you may have observed a oily emulsion between the aqueous and DCM layers. What components of tea are responsible for this emulsion? How can one minimize the size of the emulsion layer? 3. How does adding the anhydrous sodium sulfate to the dichloromethane solution remove water? 4. If the above step was omitted in the isolation procedure, how would this be reflected in the yield of caffeine? 5. A student used 8.23 g of...
Problem 5: Consider the index of
refraction n in the selected media at various wavelengths
as shown on the table.
Part (a) What is the ratio of the speed of red
light to violet light in diamond?
Numeric : A numeric value is
expected and not an expression.
vR/vV =
__________________________________________
Part (b) What is this ratio in polystyrene?
Numeric : A numeric value is
expected and not an expression.
vR/vV =
__________________________________________
Problem 6: A narrow beam of light
containing yellow (580 nm)...
Question 5:
How would dust and oil on the glass plates affect the
results?
EXPERIMENT 10 THIN FILM INTERFERENCE Light from a monochromatic source is shined downward on two glass plates that are separated at one end by a hair. Light that is reflected from the top and bottom surfaces of the wedge-shaped thin film of air undergoes interference, and a series of dark and light lines are seen. By counting the number of dark or light lines over a...
Problem 24.1: please help!!
Solar Thermal Energy 462 onsider a solur thermal elecinic plant built using a system of 2D concentrators that reflect sunight to a system of pipes carrying molten salt with concentration C # 200. Example 24.5 2D Concentrator Efficiency Optimization Wher is the optimal efficiency poxsibie (essaming an onbient temperoture of 300 K and incident sunight u 1000 W/r)? Solving eq (24.23) un encany gives 818 K At this temperature. Cartot efficiency is approximately 63% and about...
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