TS EAMCET 2023 (Online) 13th May Evening Shift | Dual Nature of Radiation Question 17 | Physics

A photon released by the transition of an electron from the second excited state to the ground state of Hydrogen atom is incident on the surface of a metal of work function 3.1 eV . The de-Broglie wavelength of the most energetic electron emitted from that metal surface is nearly

$2.6 \mathop {\rm{A}}\limits^{\rm{o}}$

$4 \mathop {\rm{A}}\limits^{\rm{o}}$

$6 \mathop {\rm{A}}\limits^{\rm{o}}$

$7 \mathop {\rm{A}}\limits^{\rm{o}}$

TS EAMCET 2023 (Online) 13th May Morning Shift

MCQ (Single Correct Answer)

-0

The de-Broglie wavelength of a particle moving with a speed of $0.8 c$ is equal to the wavelength of a photon. If $c$ is speed of the photon in vacuum, the ratio of the energy of the photon and the kinetic energy of the particle is

$2: 3$

$5: 2$

$4: 5$

$3: 5$

TS EAMCET 2023 (Online) 12th May Evening Shift

MCQ (Single Correct Answer)

-0

The additional energy that should be given to an electron to reduce its de-Broglie wavelength from 1 nm to 0.5 nm is

four times initial energy

thrice the initial energy

equal to the initial energy

twice the initial energy

TS EAMCET 2023 (Online) 12th May Morning Shift

MCQ (Single Correct Answer)

-0

The de-Broglie wavelength of an electron accelerated between two plates having a potential difference of 900 V is nearly

0.015 nm

0.01 nm

0.02 nm

0.04 nm

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