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The band gap represents the minimum energy difference between the top of the valence band and the bottom of the conduction band, However, the top of the valence band and the bottom of the conduction band are not generally at the same value of the electron momentum. In a direct band gap semiconductor, the top of the valence band and the bottom of the conduction band occur at the same value of momentum.
In an indirect band gap semiconductor, the maximum energy of the valence band occurs at a different value of momentum to the minimum in the conduction band energy
What else can I help you with?
What is the difference in energy consumption and population growth between developed and undeveloped countries?
Bubbles and dicks and cheeses
What is the difference between a coal and a wind energy?
Wind energy is a natural rescource made by harnesting it's power threw a wind turbine. Coal is the dirtiest source of energy releasing sulfur and cabon monoxide into the atmosphere.
What is the difference between inelastic collision and perfectly inelastic collision?
In an inelastic collision kinetic energy is lost (generally through energy used to change an objects shape), but the two objects rebound off each other with the remaining kinetic energy. In a perfectly inelastic collision the two objects stick together after the collision.
What is the difference between a durable good and a nondurable good?
Durable goods are those that are not often replaced such as cars, refrigerators, furniture and machinery. Nondurable goods are also known as consumables such as food, clothing, and energy.
THE TERM heat most accurately describes?
the flow of energy due to to a temperature difference
What are the difference between direct and indirect band gap materials?
In a direct band gap the electron only needs energy to jump to the conduction band. In an indirect band an electron needs energy and momentum to jump to the conduction band
what is indirect energy and direct energy?
Indirect energy refers to energy that is used to produce goods and services, such as energy used in manufacturing or transportation. Direct energy, on the other hand, refers to energy that is used directly by consumers and businesses for activities like heating, cooling, and lighting.
What is the difference between indirect and direct hot water cylinders?
Direct hot water cylinders are heated directly by an immersion heater within the cylinder, whereas indirect hot water cylinders are heated indirectly by a boiler or other external heat source through a coil or heat exchanger within the cylinder. Indirect cylinders are more efficient as they can be connected to renewable energy sources like solar panels or heat pumps.
Do direct Rays heat a place more than indirect rays?
Yes, direct rays heat a place more than indirect rays. Direct rays are concentrated and deliver more energy per unit area compared to indirect rays, which are more dispersed and have lower energy intensity. This is why direct exposure to sunlight can feel much warmer than being in the shade on a sunny day.
How does the growth of plants differ when exposed to direct vs indirect light?
Plants grow differently when exposed to direct versus indirect light. Direct light provides more energy for photosynthesis, leading to faster growth and stronger stems. In contrast, indirect light may result in slower growth and weaker stems due to less energy available for the plant.
Titanium dioxide is direct band gap or indirect band gap material?
Yes it is. Most Sn (tin) materials as semiconductors are direct band gap materials. Silicon on the other hand is an indirect band gap material.
What are the differences between direct light and indirect light, and how do they affect plant growth?
Direct light comes from a single source and shines directly on a plant, while indirect light is diffused and comes from multiple directions. Direct light provides more intense energy for photosynthesis, while indirect light is gentler and can help prevent overheating. Plants need a balance of both types of light for optimal growth, as direct light promotes flowering and fruiting, while indirect light supports overall plant health and growth.
Is germanium sulfide direct bandgap material or indirect?
Germanium sulfide is known as an indirect bandgap material, as the minimum energy required for an electron transition between the valence and conduction bands occurs at different momentum points in the Brillouin zone.
What is the difference between direct competitors and indirect competitiors?
Direct competitors are businesses that offer the same products or services and target the same customer base, making them direct alternatives to each other. Indirect competitors, on the other hand, provide different products or services that can satisfy the same customer need or solve the same problem, thereby competing for the same budget. For example, a coffee shop is a direct competitor to another coffee shop, while a tea shop or energy drink brand would be considered indirect competitors. Understanding both types of competition is essential for effective market positioning and strategy.
How does direct calorimetry and indirect calorimetry work?
Direct calorimetry measures energy expenditure by directly assessing heat production using a calorimeter. Indirect calorimetry estimates energy expenditure by measuring oxygen consumption and carbon dioxide production, which are then used to calculate energy expenditure based on known respiratory exchange ratios and energy equivalents of oxygen and carbon dioxide.
What is a direct and indirect relationship in a food web?
In a food web, a direct relationship occurs when one organism consumes another for energy, such as a predator-prey relationship. An indirect relationship involves multiple steps in the transfer of energy, such as when a predator consumes a herbivore that feeds on plants. Both direct and indirect relationships play crucial roles in maintaining the balance and stability of ecosystems.
What renable energy is indirect?
Hydropower is considered an indirect form of renewable energy because it relies on the water cycle to generate electricity. Solar and wind power are examples of direct renewable energy sources that rely on their respective natural sources for power generation.
