COMEDK 2025 Morning Shift | Dual Nature of Radiation Question 5 | Physics

A particle of mass $M$ at rest decays into masses $m_1$ and $m_2$ with non-zero velocities. The ratio of de Broglie wavelengths $\lambda_1$ and $\lambda_2$ of the particles is

$\frac{m_2}{m_1}$

$\frac{\sqrt{m_1}}{\sqrt{m_2}}$

$\frac{m_1}{m_2}$

$1: 1$

COMEDK 2025 Morning Shift

MCQ (Single Correct Answer)

-0

Emission of electrons from a metal plate illuminated with monochromatic electromagnetic radiation will always take place provided

The plate is positively charged

The plate is negatively charged

The radiation is sufficiently intense

The work function of the plate is less than the energy of a single photon and the plate is uncharged

COMEDK 2024 Evening Shift

MCQ (Single Correct Answer)

-0

A photon emitted during the de-excitation of electron from a state $$\mathrm{n}$$ to the second excited state in a hydrogen atom, irradiates a metallic electrode of work function $$0.5 \mathrm{~eV}$$, in a photocell, with a stopping voltage of $$0.47 \mathrm{~V}$$. Obtain the value of quantum number of the state '$$n$$'.

COMEDK 2024 Evening Shift

MCQ (Single Correct Answer)

-0

A particle of mass $$2 \mathrm{mg}$$ has the same wavelength as a neutron moving with a velocity of $$3 \times 10^5 \mathrm{~ms}^{-1}$$. The velocity of the particle is (mass of neutron is $$1.67 \times 10^{-27} \mathrm{Kg}$$)

$$2.5 \times 10^{-16} \mathrm{~ms}^{-1}$$

$$1.5 \times 10^{-13} \mathrm{~ms}^{-1}$$

$$2.5 \times 10^{-13} \mathrm{~ms}^{-1}$$

$$1.5 \times 10^{-16} \mathrm{~ms}^{-1}$$

PREVIOUS NEXT

COMEDK Subjects