what is the difference between direct band gap and indirect band gap?
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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.
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Active filters require an external power supply, while passive filters operate only on the signal input. ... Theoretically, passive filters have no frequency limitations while, active filters have limitations due to active elements. 6. Passive filters have a better stability and can withstand large currents.
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The difference between absorption and emission spectra are that absorption lines are where light has been absorbed by the atom thus you see a dip in the spectrum whereas emission spectra have spikes in the spectra due to atoms releasing photons at those wavelengths.
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What is the difference between direct detection and indirect detection of extra-solar planets? Direct Detection is when the exoplanet is visible through a telescope, while indirect detection refers to the situation where an exoplanet cannot be seen, but its existence is inferred from the behavior of its host star.
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Great question! And here's the answer... 'Direct measurement' refers to measuring exactly the thing that you're looking to measure, while 'indirect measurement' means that you're measuring something by measuring something else. ... This would be an example where I have to measure something 'indirectly. '
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“Direct Fired” means just that; the burner is fired directly into the process air stream to heat it. ... “Indirect Fired” means that the air is heated “indirectly”; the burner is fired into a heat exchanger.
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Direct and indirect salaries and wages have two major differences. First, direct salaries are actual compensation for services performed, while indirect salaries are a benefit of being employed. Second, direct salaries have monetary value, while indirect ones have nonmonetary value.
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The impurity added in p-type semiconductor provides extra holes known as Acceptor atom, whereas in n-type semiconductor impurity provides extra electrons and termed as Donor atom. In a p-type semiconductor, the majority carriers are holes, and minority carriers are electrons.
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Atoms emit light at certain characteristic frequencies. So one gets lines on the screen corresponding to those frequencies, in their spectra. ... Hence, in general 'spectrum' refers to the whole range of wavelengths i.e it covers the entire domain of all wavelengths. Whereas, a 'band' is a specific range in the spectrum.
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The primary differences between the two frequencies are the range (coverage) and bandwidth (speed) that the bands provide. The 2.4 GHz band provides coverage at a longer range but transmits data at slower speeds. The 5 GHz band provides less coverage but transmits data at faster speeds.
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Direct IF uses a single antibody directed against the target of interest. The primary antibody is directly conjugated to a fluorophore. Indirect IF uses two antibodies. The primary antibody is unconjugated and a fluorophore-conjugated secondary antibody directed against the primary antibody is used for detection.
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What is the difference between direct and indirect survey? ... Direct surveys are used to track species that are easy to follow. Indirect surveys are used to track species that are hard to follow.
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The basic difference between the two is that in direct MFs, you purchase the units directly from the Fund house whereas in the indirect mutual funds, there is a broker with a unique ARN No. who will purchase the desired MF units on your behalf from the Fund House and for their service rendered, charge a small fee.
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Direct lighting is when the majority of the light spread of a fixture falls on a specific object or area. ... Indirect light is the light spread that lands outside of the direct scope and lights objects other than those in the direct illumination spread.
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The main difference between the valence band and conduction band is that valence band specifies the energy level of electrons present in the valence shell of an atomic structure. As against a conduction band holds those electrons that are responsible for conduction.
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Direct material are those material which are easily identified, conveniently measured and directly charged to the cost of production. ... Indirect Material are those materials which cannot be conveniently identified & allocated to the cost centre or cost unit. It does also not form part of the finished product.
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Finance can either be direct or indirect. Direct finance is where an organization borrows cash directly from the investor. ... An example is when a company approaches an investor and sells shares to him/her. Indirect finance, on the other hand, is when the company borrows money from a financial intermediary such as banks.