MEDIUM
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IMPORTANT
Earn 100

The kinetic energy of the fastest moving photoelectron from a metal of work function is . If the frequency of light is doubled, then find the maximum kinetic energy of the photoelectron.

Important Questions on Dual Nature of Matter and Radiation
MEDIUM
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IMPORTANT
A monochromatic light incident on the metal having threshold frequency . It emits photoelectrons of maximum kinetic energy . Now the incident frequency is made three times and falls on a metal having threshold frequency . What will the maximum kinetic energy of photoelectrons be emitted by metal ?

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If the light of wavelength falls on a metal that has a stopping potential against photoelectric emission, then what is the work function of the metal. [Take and ]

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IMPORTANT
X-rays are produced in a X-ray tube by electrons accelerated through an electric potential difference of 50.0 kV. An electron makes three collisions in the target before coming to rest and loses half of its remaining kinetic energy in each of the first two collisions. Determine the wavelength of the resulting photons. (Neglect the recoil of the heavy target atoms)

MEDIUM
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Voltage applied across the coolidge tube is 25 kV. What is kinetic energy of electron striking at the target and cut-off wavelength of X-ray obtained from the tube ?

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If applied potential across the X-ray tube is made time then minimum wavelength of X-rays is shifted by . Find the original values of applied potential and minimum wavelength.

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Find the
(a) maximum frequency, and
(b) minimum wavelength of rays produced by electrons.

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IMPORTANT
(a) An X-ray tube produces a continuous spectrum of radiation with its short wavelength end at . What is the maximum energy of a photon in the radiation?
(b) From your answer to (a), guess what order of accelerating voltage (for electrons) is required in such a tube?

MEDIUM
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IMPORTANT
The de-Broglie wavelength of an electron, accelerated by potential is . What will be the de-Broglie wavelength of the electron which is accelerated by potential?
