Related InterviewSolutions

• The wavelength of a photon needed to remove a proton from a nucleus which is bound to the nucleus with 1MeV energy is nearlyA. `1.2nm`B. `1.2xx10^(-3)nm`C. `1.2xx10^(-6) nm`D. `.12xx10^(1)nm`
• Energy of `K` - shell electron be `-40000 eV`. If `60000 V` potential is applied at Coolidge tube then which of the following `X` - rays will get form ?A. ContinuousB. White `X` - raysC. Continuous and all series of characteristicD. None of these
• The wavelength of a photon needed to remove a proton from a nucleus which is bound to the nucleus with 1MeV energy is nearlyA. 1.2 nmB. `1.2xx10^(-3)` nmC. `1.2xx10^(-6)`nmD. `1.2xx10` nm
• What determines the hardness of the `X` - rays obtained from the Coolidge filament ?A. Current in the filamentB. Pressure of air in the tubeC. Nature of targetD. Potential difference between cathode and target
• It is harder to remove free electron from copper than from sodium. Which has higher work function?
• What determines the maximum velocity of the photoelectrons?
• A photon of wavelength `6630 Å` is incident on a totally reflecting surface . The momentum delivered by the photon is equal toA. `6.63 xx 10^(-27) kg - m//sec`B. `2 xx 10^(-27) kg - m//sec`C. `10^(-27) kg - m//sec`D. None of these
• The work function of copper is 4.0 eV. If two photons, each of energy 2.5 eV strike with some electrons of copper, will the emission be possible?
• An electron and a photon have same wavelength `lambda`, what is ratio of their kinetic energies ?A. `h/(m_eclambda)`B. `(2m_e clambda)/h`C. `1:1`D. `h/(2m_eclambda)`
• The number of photons `(lambda = 6630 Å)` that strike per second on a totoally reflecting screen (as shown in figure), so that a force of `1N` is exerted on the screen, is approximentely). A. `10^23`B. `10^27`C. `10^25`D. `10^26`