AP EAPCET 2025 - 21st May Morning Shift | Dual Nature of Radiation Question 10 | Physics

If the linear momentum of a proton is changed by $p_0$ then the de-Broglie wavelength associated with the proton changes by $0.25 \%$. Then the initial linear momentum of the proton is

$100 p_0$

$\frac{p_0}{400}$

$400 p_0$

$\frac{p_0}{100}$

AP EAPCET 2025 - 21st May Morning Shift

MCQ (Single Correct Answer)

-0

If an electron in the excited state falls to ground state, a photon of energy 5 eV is emitted, then the wavelength of the photon is nearly

748 nm

598 nm

398 nm

248 nm

AP EAPCET 2024 - 23th May Morning Shift

MCQ (Single Correct Answer)

-0

A photon incident on a metal of work function 2 eV produced photoelectron of maximum kinetic energy of 2 eV . The wavelength associated with the photon is

$6200 \mathop {\rm{A}}\limits^{\rm{o}}$

$3100 \mathop {\rm{A}}\limits^{\rm{o}}$

$9300 \mathop {\rm{A}}\limits^{\rm{o}}$

$2000 \mathop {\rm{A}}\limits^{\rm{o}}$

AP EAPCET 2024 - 22th May Evening Shift

MCQ (Single Correct Answer)

-0

Light of wavelength $4000\mathop {\rm{A}}\limits^{\rm{o}}$ is incident on a sodium surface for which the threshold wavelength of photoelectrons is $5420 \mathop {\rm{A}}\limits^{\rm{o}}$. The work function of sodium is

4.58 eV

2.29 eV

1.14 eV

0.57 eV

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