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Answer the following questions: Why should gases be insulators at ordinary pressures and start conducting at very low

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Answer the following questions: Every metal has a definite work function. Why do all photoelectrons not come out with the same energy if incident radiation is monochromatic? Why is there an energy distribution of

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Answer the following questions: The energy and momentum of an electron are related to the frequency and wavelength of the associated matter wave by the relations: E = h ν, p = λ h But while the value of λ is physically significant, the value of ν (and therefore,

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A particle is dropped from a height H. The de Broglie wavelength of the particle as a function of height is proportional

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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The wavelength of a photon needed to remove a proton from a nucleus which is bound to the nucleus with 1 MeV energy is

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Consider a beam of electrons (each electron with energy E0) incident on a metal surface kept in an evacuated chamber.

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Consider Fig. Suppose the voltage applied to A is increased. The diffracted beam will have the maximum at a value of θ that

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A proton, a neutron, an electron and an α-particle have same energy. Then their de Broglie wavelengths compare

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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An electron is moving with an initial velocity ` v = v_0hat i` and is in a magnetic field 0 `B=B_ 0hatj`. Then it’s de Broglie

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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An electron (mass m) with an initial velocity `V=v_0hati(v_0 > 0)` is in an electric field 0 0 ˆ `E = –E_0hati ( E_0constant > 0)` . It’s de Broglie wavelength at time t is given

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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An electron (mass m) with an initial velocity ` v = v_0hat i` is in an electric field `E=E_0hatj`. If `λ_0 = h/(mv_0)`, it’s de Breoglie wavelength at time t is given

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Relativistic corrections become neccssary when the expression for the kinetic energy `1/2mv^2` , becomes comparable with mc2, where m is the mass of the particle. At what de Broglie wavelength will relativistic corrections become important for an

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Two particles A1 sand A2 of masses m1, m2 (m1 > m2) have the same de Broglie wavelength.

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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The de Broglie wavelength of a photon is twice the de Broglie wavelength of an electron. The speed of the electron is `V_e=c/100`.

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Photons absorbed in matter are converted to heat. A source emitting n photon/sec of frequency ν is used to convert 1kg of ice at 0°C to water at 0°C. Then, the time T taken for the

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A particle moves in a closed orbit around the origin, due to a force which is directed towards the origin. The de Broglie wavelength of the particle varies cyclically between two values λ1, λ2 with λ1>λ2. Whichof the following statement are

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A proton and an α-particle are accelerated, using the same potential difference. How are the deBroglie wavelengths λp and λa related to each

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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In the explanation of photo electric effect, we asssume one photon of frequency ν collides with an electron and transfers its energy. This leads to the equation for the maximum energy `E_max` of the emitted electron as `E_max = hν – φ_0` where` φ_0` is the work function of

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Why is this fact (two photon absorption) not taken into consideration in our discussion of the stopping

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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There are materials which absorb photons of shorter wavelength and emit photons of longer wavelength. Can there be stable substances which absorb photons of larger wavelength and emit light of shorter

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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